{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-27830", "tracking": { "current_release_date": "2026-03-27T20:17:38.307080Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-27830", "initial_release_date": "2026-02-25T18:39:54.710696Z", "revision_history": [ { "date": "2026-02-25T18:39:54.710696Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-02-25T18:39:56.901553Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-02-26T00:31:40.282660Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (41).| Product Identifiers created (40).| References created (2).| CWES updated (1)." }, { "date": "2026-02-26T00:31:51.649609Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-02-26T01:24:48.003286Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (5).| CWES updated (1)." }, { "date": "2026-02-26T01:24:58.204032Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-02-26T01:39:05.173677Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (5).| CWES updated (1)." }, { "date": "2026-02-26T01:39:15.048455Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-02-26T07:35:36.276589Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-02-26T11:26:59.497991Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (59).| Products created (17).| References created (7).| CWES updated (1)." }, { "date": "2026-02-26T11:27:15.164665Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-02-26T14:13:31.289902Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-02-26T14:13:33.364859Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-02-27T00:42:47.109392Z", "number": "14", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (2)." }, { "date": "2026-02-27T00:42:51.836411Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-02-27T17:38:55.754676Z", "number": "16", "summary": "Unknown change." }, { "date": "2026-02-27T17:39:06.243180Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-02-27T22:39:45.282690Z", "number": "18", "summary": "References created (4)." }, { "date": "2026-02-28T00:27:55.453580Z", "number": "19", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (12).| Product Identifiers created (12).| Products created (22).| References created (7).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-02-28T00:27:59.480145Z", "number": "20", "summary": "NCSC Score updated." }, { "date": "2026-02-28T06:15:36.876419Z", "number": "21", "summary": "References created (4)." }, { "date": "2026-03-06T12:29:06.163118Z", "number": "22", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| Product Remediations created (1).| References created (15).| CWES updated (1)." }, { "date": "2026-03-06T12:29:18.080474Z", "number": "23", "summary": "NCSC Score updated." }, { "date": "2026-03-11T13:05:37.401104Z", "number": "24", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (5)." }, { "date": "2026-03-11T13:05:39.995379Z", "number": "25", "summary": "NCSC Score updated." }, { "date": "2026-03-12T12:27:31.961197Z", "number": "26", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| Product Remediations created (1).| References created (12).| CWES updated (1)." }, { "date": "2026-03-12T12:27:41.150674Z", "number": "27", "summary": "NCSC Score updated." }, { "date": "2026-03-20T09:39:39.928537Z", "number": "28", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T09:39:43.255016Z", "number": "29", "summary": "NCSC Score updated." }, { "date": "2026-03-27T19:49:15.104885Z", "number": "30", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (8).| CWES updated (1)." }, { "date": "2026-03-27T19:49:19.423404Z", "number": "31", "summary": "NCSC Score updated." } ], "status": "interim", "version": "31" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/debezium for red hat application foundations <3.2.7", "product": { "name": "vers:unknown/debezium for red hat application foundations <3.2.7", "product_id": "CSAFPID-5794553" } } ], "category": "product_name", "name": "Enterprise Linux" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/3", "product": { "name": "vers:rpm/3", "product_id": "CSAFPID-5810324", "product_identification_helper": { "cpe": "cpe:/a:redhat:debezium:3" } } } ], "category": "product_name", "name": "Red Hat Build of Debezium 3.2" } ], "category": "product_family", "name": "Red Hat Integration" 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"product_id": "CSAFPID-3357211" } }, { "category": "product_version_range", "name": "vers:unknown/c3p0-0.9.5-pre2", "product": { "name": "vers:unknown/c3p0-0.9.5-pre2", "product_id": "CSAFPID-3357212" } }, { "category": "product_version_range", "name": "vers:unknown/c3p0-0.9.5-pre3", "product": { "name": "vers:unknown/c3p0-0.9.5-pre3", "product_id": "CSAFPID-3357213" } }, { "category": "product_version_range", "name": "vers:unknown/c3p0-0.9.5-pre4", "product": { "name": "vers:unknown/c3p0-0.9.5-pre4", "product_id": "CSAFPID-3357214" } }, { "category": "product_version_range", "name": "vers:unknown/c3p0-0.9.5-pre5", "product": { "name": "vers:unknown/c3p0-0.9.5-pre5", "product_id": "CSAFPID-3357215" } }, { "category": "product_version_range", "name": "vers:unknown/c3p0-0.9.5-pre6", "product": { "name": "vers:unknown/c3p0-0.9.5-pre6", "product_id": "CSAFPID-3357216" } }, { "category": "product_version_range", "name": "vers:unknown/c3p0-0.9.5-pre7", "product": { "name": 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"vers:unknown/c3p0-0.9.5.4", "product_id": "CSAFPID-5727590" } }, { "category": "product_version_range", "name": "vers:unknown/c3p0-0.9.5.5", "product": { "name": "vers:unknown/c3p0-0.9.5.5", "product_id": "CSAFPID-5727591" } }, { "category": "product_version_range", "name": "vers:unknown/v.0.10.0", "product": { "name": "vers:unknown/v.0.10.0", "product_id": "CSAFPID-5727592" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.0-pre1", "product": { "name": "vers:unknown/v0.10.0-pre1", "product_id": "CSAFPID-5727593" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.0-pre2", "product": { "name": "vers:unknown/v0.10.0-pre2", "product_id": "CSAFPID-5727594" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.0-pre3", "product": { "name": "vers:unknown/v0.10.0-pre3", "product_id": "CSAFPID-5727595" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.0-pre4", "product": { "name": "vers:unknown/v0.10.0-pre4", "product_id": "CSAFPID-5727596" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.0-pre5", "product": { "name": "vers:unknown/v0.10.0-pre5", "product_id": "CSAFPID-5727597" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.0-pre6", "product": { "name": "vers:unknown/v0.10.0-pre6", "product_id": "CSAFPID-5727598" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.0-pre7", "product": { "name": "vers:unknown/v0.10.0-pre7", "product_id": "CSAFPID-5727599" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.1", "product": { "name": "vers:unknown/v0.10.1", "product_id": "CSAFPID-5727600" } }, { "category": "product_version_range", "name": "vers:unknown/v0.10.2", "product": { "name": "vers:unknown/v0.10.2", "product_id": "CSAFPID-5727601" } }, { "category": "product_version_range", "name": "vers:unknown/v0.11.0", "product": { "name": "vers:unknown/v0.11.0", "product_id": "CSAFPID-5727602" } }, { "category": "product_version_range", "name": "vers:unknown/v0.11.0-pre1", "product": { "name": "vers:unknown/v0.11.0-pre1", "product_id": "CSAFPID-5727603" } }, { "category": "product_version_range", "name": "vers:unknown/v0.11.0-pre2", "product": { "name": "vers:unknown/v0.11.0-pre2", "product_id": "CSAFPID-5727604" } }, { "category": "product_version_range", "name": "vers:unknown/v0.11.1", "product": { "name": "vers:unknown/v0.11.1", "product_id": "CSAFPID-5727605" } }, { "category": "product_version_range", "name": "vers:unknown/v0.11.2", "product": { "name": "vers:unknown/v0.11.2", "product_id": "CSAFPID-5727606" } } ], "category": "product_name", "name": "c3p0" } ], "category": "vendor", "name": "swaldman" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/0.12.0", "product": { "name": "vers:unknown/0.12.0", "product_id": "CSAFPID-5944645" } } ], "category": "product_name", "name": "maven/com.mchange/c3p0" } ], "category": "vendor", "name": "com.mchange" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-27830", "cwe": { "id": "CWE-502", "name": "Deserialization of Untrusted Data" }, "notes": [ { "category": "description", "text": "### Impact\n\nc3p0 is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`.\n\nThe danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`.\n\nAlthough hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility.\n\n### Patches\n\nThe `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization.\n\nc3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. Those parameters are documented [here](https://www.mchange.com/projects/c3p0/#configuring_security).\n\nc3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names.\n\n### Workarounds\n\nUsers should upgrade to c3p0-0.12.0 or above. There is no supported workaround for earlier versions of c3p0.\n\n### References\n\n[c3p0, you little rascal — Hans-Martin Münch](https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal/)\n[c3p0 documentation, security note](https://www.mchange.com/projects/c3p0/#security-note)\n[c3p0 documentation, configuring security](https://www.mchange.com/projects/c3p0/#configuring_security)", "title": "github - https://github.com/advisories/GHSA-5476-xc4j-rqcv" }, { "category": "description", "text": "### Impact\n\nc3p0 is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`.\n\nThe danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`.\n\nAlthough hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility.\n\n### Patches\n\nThe `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization.\n\nc3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. Those parameters are documented [here](https://www.mchange.com/projects/c3p0/#configuring_security).\n\nc3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names.\n\n### Workarounds\n\nUsers should upgrade to c3p0-0.12.0 or above. There is no supported workaround for earlier versions of c3p0.\n\n### References\n\n[c3p0, you little rascal — Hans-Martin Münch](https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal/)\n[c3p0 documentation, security note](https://www.mchange.com/projects/c3p0/#security-note)\n[c3p0 documentation, configuring security](https://www.mchange.com/projects/c3p0/#configuring_security)", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Maven%2FGHSA-5476-xc4j-rqcv.json?alt=media" }, { "category": "description", "text": "c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. Although hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-27830" }, { "category": "description", "text": "c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. Although hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-27830" }, { "category": "description", "text": "c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. Although hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27830.json?alt=media" }, { "category": "description", "text": "c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. Although hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-27830" }, { "category": "description", "text": "c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. Although hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0.\nA flaw was found in c3p0, a Java Database Connectivity (JDBC) Connection pooling library. This vulnerability allows an attacker to achieve arbitrary code execution by providing maliciously crafted Java-serialized objects or `javax.naming.Reference` instances. By manipulating the `userOverridesAsString` property, an attacker can cause the application to download and execute malicious code from a remote location on its CLASSPATH.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-27830" }, { "category": "description", "text": "A flaw was found in c3p0, a Java Database Connectivity (JDBC) Connection pooling library. This vulnerability allows an attacker to achieve arbitrary code execution by providing maliciously crafted Java-serialized objects or `javax.naming.Reference` instances. By manipulating the `userOverridesAsString` property, an attacker can cause the application to download and execute malicious code from a remote location on its CLASSPATH.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:3890" }, { "category": "description", "text": "A flaw was found in c3p0, a Java Database Connectivity (JDBC) Connection pooling library. This vulnerability allows an attacker to achieve arbitrary code execution by providing maliciously crafted Java-serialized objects or `javax.naming.Reference` instances. By manipulating the `userOverridesAsString` property, an attacker can cause the application to download and execute malicious code from a remote location on its CLASSPATH.", "title": "redhat - https://access.redhat.com/errata/RHSA-2026:4285" }, { "category": "description", "text": "c3p0 is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map>`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`.\n\nThe danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`.\n\nAlthough hazard presented by c3p0's vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility.", "title": "gitlab - https://gitlab.com/api/v4/projects/25847700/repository/files/maven%2Fcom.mchange%2Fc3p0%2FCVE-2026-27830.yml/raw" }, { "category": "other", "text": "0.00173", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "title": "CVSSV4" }, { "category": "other", "text": "8.9", "title": "CVSSV4 base score" }, { "category": "other", "text": "4.7", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde, The value of the most recent CVSS (V3) score, VENDOR FIX as product remediation category", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is product_remediation data available from source Redhat, Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 3\n", "title": "Vendor assessment" } ], "product_status": { "fixed": [ "CSAFPID-5766379", "CSAFPID-5810324", "CSAFPID-5944645" ], "known_affected": [ "CSAFPID-5721602", "CSAFPID-5721603", "CSAFPID-5721604", "CSAFPID-5721605", "CSAFPID-5721606", "CSAFPID-5721607", "CSAFPID-5721608", "CSAFPID-5721609", "CSAFPID-5721610", "CSAFPID-5721611", "CSAFPID-5721613", "CSAFPID-5721614", "CSAFPID-5721616", "CSAFPID-5721617", "CSAFPID-5721619", "CSAFPID-5721620", "CSAFPID-5721621", "CSAFPID-5721622", "CSAFPID-5721624", "CSAFPID-5721625", "CSAFPID-5721626", "CSAFPID-5721627", "CSAFPID-5721628", "CSAFPID-5721630", "CSAFPID-5721631", "CSAFPID-5721632", "CSAFPID-5721633", "CSAFPID-5721635", "CSAFPID-5721636", "CSAFPID-5721637", "CSAFPID-5721638", "CSAFPID-5721639", "CSAFPID-5721641", "CSAFPID-5721642", "CSAFPID-5721643", "CSAFPID-5721644", "CSAFPID-5721645", "CSAFPID-5721647", "CSAFPID-5721648", "CSAFPID-5721649", "CSAFPID-5721650", "CSAFPID-5723444", "CSAFPID-3357164", "CSAFPID-3357165", "CSAFPID-3357166", "CSAFPID-3357167", "CSAFPID-3357168", "CSAFPID-3357169", "CSAFPID-3357170", "CSAFPID-3357171", "CSAFPID-3357172", "CSAFPID-3357173", "CSAFPID-3357174", "CSAFPID-3357175", "CSAFPID-3357176", "CSAFPID-3357177", "CSAFPID-3357178", "CSAFPID-3357179", "CSAFPID-3357180", "CSAFPID-3357181", "CSAFPID-3357182", "CSAFPID-3357183", "CSAFPID-3357184", "CSAFPID-3357185", "CSAFPID-3357186", "CSAFPID-3357187", "CSAFPID-3357188", "CSAFPID-3357189", "CSAFPID-3357190", "CSAFPID-3357191", "CSAFPID-3357192", "CSAFPID-3357193", "CSAFPID-3357194", "CSAFPID-3357195", "CSAFPID-3357196", "CSAFPID-3357197", "CSAFPID-3357198", "CSAFPID-3357199", "CSAFPID-3357200", "CSAFPID-3357201", "CSAFPID-3357202", "CSAFPID-3357203", "CSAFPID-3357204", "CSAFPID-3357205", "CSAFPID-3357206", "CSAFPID-3357207", "CSAFPID-3357208", "CSAFPID-3357209", "CSAFPID-3357210", "CSAFPID-3357211", "CSAFPID-3357212", "CSAFPID-3357213", "CSAFPID-3357214", "CSAFPID-3357215", "CSAFPID-3357216", "CSAFPID-3357217", "CSAFPID-3357218", "CSAFPID-3357219", "CSAFPID-3357220", "CSAFPID-3357221", "CSAFPID-3357222", "CSAFPID-5727590", "CSAFPID-5727591", "CSAFPID-5727592", "CSAFPID-5727593", "CSAFPID-5727594", "CSAFPID-5727595", "CSAFPID-5727596", "CSAFPID-5727597", "CSAFPID-5727598", "CSAFPID-5727599", "CSAFPID-5727600", "CSAFPID-5727601", "CSAFPID-5727602", "CSAFPID-5727603", "CSAFPID-5727604", "CSAFPID-5727605", "CSAFPID-5727606", "CSAFPID-1390763", "CSAFPID-1390764", "CSAFPID-1439286", "CSAFPID-1439294", "CSAFPID-1439300", "CSAFPID-1439302", "CSAFPID-1439304", "CSAFPID-1439313", "CSAFPID-2467441", "CSAFPID-2467457", "CSAFPID-2783932", "CSAFPID-2783934", "CSAFPID-3026117", "CSAFPID-5736839", "CSAFPID-5736840", "CSAFPID-5736841", "CSAFPID-5736842", "CSAFPID-5736843", "CSAFPID-5736844", "CSAFPID-5736845", "CSAFPID-5736846", "CSAFPID-5736847", "CSAFPID-5736848", "CSAFPID-5736849", "CSAFPID-5736850", "CSAFPID-5736851", "CSAFPID-5736852", "CSAFPID-5736853", "CSAFPID-5736854", "CSAFPID-5736855", "CSAFPID-5736857", "CSAFPID-5736858", "CSAFPID-5736859", "CSAFPID-5736860", "CSAFPID-5794553" ], "known_not_affected": [ "CSAFPID-1439306", "CSAFPID-5736856" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-5476-xc4j-rqcv" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-5476-xc4j-rqcv" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Maven%2FGHSA-5476-xc4j-rqcv.json?alt=media" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27830" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-27830" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-27830" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/27xxx/CVE-2026-27830.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-27830.json?alt=media" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-27830" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-27830" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-27830" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27830.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:3890" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:3890.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0694.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4285" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/csaf/RHSA-2026:4285.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - gitlab", "url": "https://gitlab.com/api/v4/projects/25847700/repository/files/maven%2Fcom.mchange%2Fc3p0%2FCVE-2026-27830.yml/raw" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e" }, { "category": "external", "summary": "Reference - github; gitlab", "url": "https://github.com/advisories/GHSA-5476-xc4j-rqcv" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://www.mchange.com/projects/c3p0/#configuring_security" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://www.mchange.com/projects/c3p0/#security-note" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27830.json" }, { "category": "external", "summary": "Reference - github; gitlab; osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27830" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-27830" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-27830" }, { "category": "external", "summary": "Reference - redhat", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442908" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/errata/RHSA-2026:3890" }, { "category": "external", "summary": "Reference - redhat", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "Reference - redhat", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2408784" }, { "category": "external", "summary": "Reference - redhat", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2430180" }, { "category": "external", "summary": "Reference - redhat", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442671" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_3890.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0694.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0694" }, { "category": "external", "summary": "Reference - certbundde; redhat", "url": "https://access.redhat.com/errata/RHSA-2026:4285" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://access.redhat.com/security/cve/cve-2026-27727" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://access.redhat.com/security/cve/cve-2026-27830" }, { "category": "external", "summary": "Reference - redhat", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_4285.json" }, { "category": "external", "summary": "Reference - gitlab", "url": "https://github.com/swaldman/c3p0" } ], "remediations": [ { "category": "vendor_fix", "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "CSAFPID-5766379" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:3890" }, { "category": "vendor_fix", "details": "To apply this update, follow the standard installation procedure for your platform:\n\n* https://docs.redhat.com/en/documentation/red_hat_build_of_debezium/3.2.7/html-single/installing_debezium_on_openshift/index\n*\nhttps://docs.redhat.com/en/documentation/red_hat_build_of_debezium/3.2.7/html-single/installing_debezium_on_rhel/index", "product_ids": [ "CSAFPID-5810324" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2026:4285" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.0, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1390763", "CSAFPID-1390764", "CSAFPID-1439286", "CSAFPID-1439294", "CSAFPID-1439300", "CSAFPID-1439302", "CSAFPID-1439304", "CSAFPID-1439313", "CSAFPID-2467441", "CSAFPID-2467457", "CSAFPID-2783932", "CSAFPID-2783934", "CSAFPID-3026117", "CSAFPID-3357164", "CSAFPID-3357165", "CSAFPID-3357166", "CSAFPID-3357167", "CSAFPID-3357168", "CSAFPID-3357169", "CSAFPID-3357170", "CSAFPID-3357171", "CSAFPID-3357172", "CSAFPID-3357173", "CSAFPID-3357174", "CSAFPID-3357175", "CSAFPID-3357176", "CSAFPID-3357177", "CSAFPID-3357178", "CSAFPID-3357179", "CSAFPID-3357180", "CSAFPID-3357181", "CSAFPID-3357182", "CSAFPID-3357183", "CSAFPID-3357184", "CSAFPID-3357185", "CSAFPID-3357186", "CSAFPID-3357187", "CSAFPID-3357188", "CSAFPID-3357189", "CSAFPID-3357190", "CSAFPID-3357191", "CSAFPID-3357192", "CSAFPID-3357193", "CSAFPID-3357194", "CSAFPID-3357195", "CSAFPID-3357196", "CSAFPID-3357197", "CSAFPID-3357198", "CSAFPID-3357199", "CSAFPID-3357200", "CSAFPID-3357201", "CSAFPID-3357202", "CSAFPID-3357203", "CSAFPID-3357204", "CSAFPID-3357205", "CSAFPID-3357206", "CSAFPID-3357207", "CSAFPID-3357208", "CSAFPID-3357209", "CSAFPID-3357210", "CSAFPID-3357211", "CSAFPID-3357212", "CSAFPID-3357213", "CSAFPID-3357214", "CSAFPID-3357215", "CSAFPID-3357216", "CSAFPID-3357217", "CSAFPID-3357218", "CSAFPID-3357219", "CSAFPID-3357220", "CSAFPID-3357221", "CSAFPID-3357222", "CSAFPID-5721602", "CSAFPID-5721603", "CSAFPID-5721604", "CSAFPID-5721605", "CSAFPID-5721606", "CSAFPID-5721607", "CSAFPID-5721608", "CSAFPID-5721609", "CSAFPID-5721610", "CSAFPID-5721611", "CSAFPID-5721613", "CSAFPID-5721614", "CSAFPID-5721616", "CSAFPID-5721617", "CSAFPID-5721619", "CSAFPID-5721620", "CSAFPID-5721621", "CSAFPID-5721622", "CSAFPID-5721624", "CSAFPID-5721625", "CSAFPID-5721626", "CSAFPID-5721627", "CSAFPID-5721628", "CSAFPID-5721630", "CSAFPID-5721631", "CSAFPID-5721632", "CSAFPID-5721633", "CSAFPID-5721635", "CSAFPID-5721636", "CSAFPID-5721637", "CSAFPID-5721638", "CSAFPID-5721639", "CSAFPID-5721641", "CSAFPID-5721642", "CSAFPID-5721643", "CSAFPID-5721644", "CSAFPID-5721645", "CSAFPID-5721647", "CSAFPID-5721648", "CSAFPID-5721649", "CSAFPID-5721650", "CSAFPID-5723444", "CSAFPID-5727590", "CSAFPID-5727591", "CSAFPID-5727592", "CSAFPID-5727593", "CSAFPID-5727594", "CSAFPID-5727595", "CSAFPID-5727596", "CSAFPID-5727597", "CSAFPID-5727598", "CSAFPID-5727599", "CSAFPID-5727600", "CSAFPID-5727601", "CSAFPID-5727602", "CSAFPID-5727603", "CSAFPID-5727604", "CSAFPID-5727605", "CSAFPID-5727606", "CSAFPID-5736839", "CSAFPID-5736840", "CSAFPID-5736841", "CSAFPID-5736842", "CSAFPID-5736843", "CSAFPID-5736844", "CSAFPID-5736845", "CSAFPID-5736846", "CSAFPID-5736847", "CSAFPID-5736848", "CSAFPID-5736849", "CSAFPID-5736850", "CSAFPID-5736851", "CSAFPID-5736852", "CSAFPID-5736853", "CSAFPID-5736854", "CSAFPID-5736855", "CSAFPID-5736857", "CSAFPID-5736858", "CSAFPID-5736859", "CSAFPID-5736860", "CSAFPID-5794553" ] } ], "title": "CVE-2026-27830" } ] }