{ "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-2026-55200", "tracking": { "current_release_date": "2026-06-24T00:28:32.518213Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-55200", "initial_release_date": "2026-06-17T20:12:29.616626Z", "revision_history": [ { "date": "2026-06-17T20:12:29.616626Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2).| References created (3).| CWES updated (1)." }, { "date": "2026-06-17T20:12:37.762134Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-06-17T20:54:21.835345Z", "number": "3", "summary": "Unknown change." }, { "date": "2026-06-18T11:05:49.639610Z", "number": "4", "summary": "Source connected.| CVE status created. (valid)| Products connected (2).| References created (4)." }, { "date": "2026-06-18T11:05:53.883436Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-06-18T11:26:55.118039Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-06-18T12:43:39.397070Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (2)." }, { "date": "2026-06-18T12:43:42.068960Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-06-18T14:24:39.490975Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-06-18T14:24:49.291457Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-06-19T15:40:18.537845Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (39).| Product Identifiers created (31).| References created (3)." }, { "date": "2026-06-19T15:40:25.696091Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-06-22T13:37:48.769012Z", "number": "13", "summary": "CVSS created." }, { "date": "2026-06-22T18:36:11.943868Z", "number": "14", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-06-22T18:36:16.736375Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-06-23T09:54:37.474189Z", "number": "16", "summary": "Source connected.| CVE status created. (valid)" }, { "date": "2026-06-23T09:54:39.840385Z", "number": "17", "summary": "NCSC Score updated." }, { "date": "2026-06-23T18:01:40.591272Z", "number": "18", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (4).| References created (1)." }, { "date": "2026-06-23T18:01:50.162554Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-06-24T00:28:23.302709Z", "number": "20", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (6).| Product Identifiers created (3).| Product Remediations created (6).| References created (5).| Vendor_assessment created." }, { "date": "2026-06-24T00:28:29.672538Z", "number": "21", "summary": "NCSC Score updated." } ], "status": "interim", "version": "21" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/6", "product": { "name": "vers:rpm/6", "product_id": "CSAFPID-1439321", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:6" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/7", "product": { "name": "vers:rpm/7", "product_id": "CSAFPID-1439315", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:7" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/1", "product": { "name": "vers:rpm/1", "product_id": "CSAFPID-6014972", "product_identification_helper": { "cpe": "cpe:/a:redhat:hummingbird:1" } } } ], "category": "product_name", "name": "Red Hat Hardened Images" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-3106288" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-3106289" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-8490068" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Red Hat Hardened Images" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<1.11.1-r2", "product": { "name": "vers:unknown/>=0|<1.11.1-r2", "product_id": "CSAFPID-8489632" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Alpine:v3.21" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<1.11.1-r2", "product": { "name": "vers:unknown/>=0|<1.11.1-r2", "product_id": "CSAFPID-8489633" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Alpine:v3.22" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/>=0|<1.11.1-r3", "product": { "name": 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} ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<1.11.1 commit 1762685", "product": { "name": "vers:unknown/<1.11.1 commit 1762685", "product_id": "CSAFPID-8476804" } }, { "category": "product_version_range", "name": "vers:unknown/<1.11.1 commit 7acf3df", "product": { "name": "vers:unknown/<1.11.1 commit 7acf3df", "product_id": "CSAFPID-8476803" } } ], "category": "product_name", "name": "libssh2" } ], "category": "vendor", "name": "Open Source" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.8.0-1", "product": { "name": "vers:unknown/1.8.0-1", "product_id": "CSAFPID-7765964", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.8.0-1?arch=source&distro=bionic" } } }, { "category": "product_version_range", "name": "vers:unknown/1.8.0-1ubuntu0.1", "product": { "name": "vers:unknown/1.8.0-1ubuntu0.1", "product_id": "CSAFPID-7765965", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.8.0-1ubuntu0.1?arch=source&distro=bionic" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0", "product": { "name": "vers:unknown/>=0", "product_id": "CSAFPID-7765966" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Ubuntu:18.04:LTS" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.8.0-2.1build1", "product": { "name": "vers:unknown/1.8.0-2.1build1", "product_id": "CSAFPID-7765967", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.8.0-2.1build1?arch=source&distro=focal" } } }, { "category": "product_version_range", "name": "vers:unknown/1.8.0-2.1ubuntu0.1", "product": { "name": "vers:unknown/1.8.0-2.1ubuntu0.1", "product_id": "CSAFPID-7765968", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.8.0-2.1ubuntu0.1?arch=source&distro=focal" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0", "product": { "name": "vers:unknown/>=0", "product_id": "CSAFPID-7765969" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Ubuntu:20.04:LTS" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.10.0-2", "product": { "name": "vers:unknown/1.10.0-2", "product_id": "CSAFPID-7765971", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.10.0-2?arch=source&distro=jammy" } } }, { "category": "product_version_range", "name": "vers:unknown/1.10.0-2build1", "product": { "name": "vers:unknown/1.10.0-2build1", "product_id": "CSAFPID-7765972", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.10.0-2build1?arch=source&distro=jammy" } } }, { "category": "product_version_range", "name": 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"pkg:deb/ubuntu/libssh2@1.11.0-2?arch=source&distro=noble" } } }, { "category": "product_version_range", "name": "vers:unknown/1.11.0-3", "product": { "name": "vers:unknown/1.11.0-3", "product_id": "CSAFPID-7765692", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.11.0-3?arch=source&distro=noble" } } }, { "category": "product_version_range", "name": "vers:unknown/1.11.0-4", "product": { "name": "vers:unknown/1.11.0-4", "product_id": "CSAFPID-7765693", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.11.0-4?arch=source&distro=noble" } } }, { "category": "product_version_range", "name": "vers:unknown/1.11.0-4.1build1", "product": { "name": "vers:unknown/1.11.0-4.1build1", "product_id": "CSAFPID-7765694", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.11.0-4.1build1?arch=source&distro=noble" } } }, { "category": "product_version_range", "name": "vers:unknown/1.11.0-4.1build2", "product": { "name": 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"pkg:deb/ubuntu/libssh2@1.11.1-1?arch=source&distro=questing" } } }, { "category": "product_version_range", "name": "vers:unknown/1.11.1-1build1", "product": { "name": "vers:unknown/1.11.1-1build1", "product_id": "CSAFPID-7765698", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.11.1-1build1?arch=source&distro=questing" } } }, { "category": "product_version_range", "name": "vers:unknown/1.11.1-1ubuntu0.25.10.1", "product": { "name": "vers:unknown/1.11.1-1ubuntu0.25.10.1", "product_id": "CSAFPID-8480428", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.11.1-1ubuntu0.25.10.1?arch=source&distro=questing" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0", "product": { "name": "vers:unknown/>=0", "product_id": "CSAFPID-8480429" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Ubuntu:25.10" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": 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"name": "libssh2" } ], "category": "product_family", "name": "Ubuntu:26.04:LTS" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.4.3-1", "product": { "name": "vers:unknown/1.4.3-1", "product_id": "CSAFPID-7765951", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.4.3-1?arch=source&distro=esm-infra-legacy/trusty" } } }, { "category": "product_version_range", "name": "vers:unknown/1.4.3-2", "product": { "name": "vers:unknown/1.4.3-2", "product_id": "CSAFPID-7765952", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.4.3-2?arch=source&distro=esm-infra-legacy/trusty" } } }, { "category": "product_version_range", "name": "vers:unknown/1.4.3-2ubuntu0.1", "product": { "name": "vers:unknown/1.4.3-2ubuntu0.1", "product_id": "CSAFPID-7765953", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.4.3-2ubuntu0.1?arch=source&distro=esm-infra-legacy/trusty" } } }, { "category": "product_version_range", "name": "vers:unknown/1.4.3-2ubuntu0.2", "product": { "name": "vers:unknown/1.4.3-2ubuntu0.2", "product_id": "CSAFPID-7765954", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.4.3-2ubuntu0.2?arch=source&distro=esm-infra-legacy/trusty" } } }, { "category": "product_version_range", "name": "vers:unknown/1.4.3-2ubuntu0.2+esm1", "product": { "name": "vers:unknown/1.4.3-2ubuntu0.2+esm1", "product_id": "CSAFPID-7765955", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.4.3-2ubuntu0.2%2Besm1?arch=source&distro=esm-infra-legacy/trusty" } } }, { "category": "product_version_range", "name": "vers:unknown/1.4.3-2ubuntu0.2+esm2", "product": { "name": "vers:unknown/1.4.3-2ubuntu0.2+esm2", "product_id": "CSAFPID-7765956", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.4.3-2ubuntu0.2%2Besm2?arch=source&distro=esm-infra-legacy/trusty" } } }, { "category": "product_version_range", "name": "vers:unknown/1.4.3-2ubuntu0.2+esm3", "product": { "name": "vers:unknown/1.4.3-2ubuntu0.2+esm3", "product_id": "CSAFPID-7765957", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.4.3-2ubuntu0.2%2Besm3?arch=source&distro=esm-infra-legacy/trusty" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0", "product": { "name": "vers:unknown/>=0", "product_id": "CSAFPID-7765958" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Ubuntu:Pro:14.04:LTS" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.5.0-2", "product": { "name": "vers:unknown/1.5.0-2", "product_id": "CSAFPID-7765959", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.5.0-2?arch=source&distro=esm-apps/xenial" } } }, { "category": "product_version_range", "name": "vers:unknown/1.5.0-2ubuntu0.1", "product": { "name": "vers:unknown/1.5.0-2ubuntu0.1", "product_id": "CSAFPID-7765960", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.5.0-2ubuntu0.1?arch=source&distro=esm-apps/xenial" } } }, { "category": "product_version_range", "name": "vers:unknown/1.5.0-2ubuntu0.1+esm1", "product": { "name": "vers:unknown/1.5.0-2ubuntu0.1+esm1", "product_id": "CSAFPID-7765961", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.5.0-2ubuntu0.1%2Besm1?arch=source&distro=esm-apps/xenial" } } }, { "category": "product_version_range", "name": "vers:unknown/1.5.0-2ubuntu0.1+esm2", "product": { "name": "vers:unknown/1.5.0-2ubuntu0.1+esm2", "product_id": "CSAFPID-7765962", "product_identification_helper": { "purl": "pkg:deb/ubuntu/libssh2@1.5.0-2ubuntu0.1%2Besm2?arch=source&distro=esm-apps/xenial" } } }, { "category": "product_version_range", "name": "vers:unknown/>=0", "product": { "name": "vers:unknown/>=0", "product_id": "CSAFPID-7765963" } } ], "category": "product_name", "name": "libssh2" } ], "category": "product_family", "name": "Ubuntu:Pro:16.04:LTS" } ], "category": "vendor", "name": "Ubuntu" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:git/7acf3dfda80c91c3a8c9f2372546301d4a1a7a8", "product": { "name": "vers:git/7acf3dfda80c91c3a8c9f2372546301d4a1a7a8", "product_id": "CSAFPID-8474293" } }, { "category": "product_version_range", "name": "vers:semver/<=1.11.1", "product": { "name": "vers:semver/<=1.11.1", "product_id": "CSAFPID-8474292" } } ], "category": "product_name", "name": "libssh2" } ], "category": "vendor", "name": "libssh2" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-55200", "notes": [ { "category": "description", "text": "libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/55xxx/CVE-2026-55200.json" }, { "category": "description", "text": "libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-55200" }, { "category": "description", "text": "(libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bou ...)", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Ubuntu%2FUBUNTU-CVE-2026-55200.json?alt=media" }, { "category": "description", "text": "libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-55200" }, { "category": "description", "text": "libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Alpine%2FALPINE-CVE-2026-55200.json?alt=media" }, { "category": "description", "text": "libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.\nAn out-of-bounds write vulnerability exists in the libssh2 client. A remote attacker can exploit this by sending a specially crafted SSH packet with an abnormally large length value. This corrupts the application's memory and can potentially allow the attacker to execute arbitrary code on the affected system.\nAn Important-rated out-of-bounds write vulnerability in libssh2 allows unauthenticated remote attackers to execute arbitrary code. By sending oversized, maliciously crafted SSH packets, an attacker can corrupt system memory and compromise the host.\nNote: Red Hat Enterprise Linux (RHEL) 8 and newer are not affected by this flaw, as they do not ship the libssh2 package..", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-55200.json" }, { "category": "other", "text": "0.00552", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "9.2", "title": "CVSSV4 base score" }, { "category": "other", "text": "3.9", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to an uncommon product vendor, Is related to (a version of) an uncommon product, Is related to a product by vendor Open Source, There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 3\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-8474292", "CSAFPID-8476803", "CSAFPID-8476804", "CSAFPID-6453846", "CSAFPID-6453847", "CSAFPID-7765691", "CSAFPID-7765692", "CSAFPID-7765693", "CSAFPID-7765694", "CSAFPID-7765695", "CSAFPID-7765697", "CSAFPID-7765698", "CSAFPID-7765700", "CSAFPID-7765701", "CSAFPID-7765951", "CSAFPID-7765952", "CSAFPID-7765953", "CSAFPID-7765954", "CSAFPID-7765955", "CSAFPID-7765956", "CSAFPID-7765957", "CSAFPID-7765958", "CSAFPID-7765959", "CSAFPID-7765960", "CSAFPID-7765961", "CSAFPID-7765962", "CSAFPID-7765963", "CSAFPID-7765964", "CSAFPID-7765965", "CSAFPID-7765966", "CSAFPID-7765967", "CSAFPID-7765968", "CSAFPID-7765969", "CSAFPID-7765970", "CSAFPID-7765971", "CSAFPID-7765972", "CSAFPID-7765973", "CSAFPID-7765974", "CSAFPID-8480426", "CSAFPID-8480427", "CSAFPID-8480428", "CSAFPID-8480429", "CSAFPID-8480430", "CSAFPID-8480431", "CSAFPID-8489632", "CSAFPID-8489633", "CSAFPID-8489634", "CSAFPID-8489635", "CSAFPID-1439315", "CSAFPID-1439321", "CSAFPID-3106288", "CSAFPID-3106289", "CSAFPID-6014972", "CSAFPID-8490068" ], "known_not_affected": [ "CSAFPID-8474293" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/55xxx/CVE-2026-55200.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1996.json" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-55200" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Ubuntu%2FUBUNTU-CVE-2026-55200.json?alt=media" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-55200" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0210" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Alpine%2FALPINE-CVE-2026-55200.json?alt=media" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-55200.json" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; osv; redhat", "url": "https://github.com/libssh2/libssh2/pull/2052" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://github.com/libssh2/libssh2/commit/97acf3dfda80c91c3a8c9f2372546301d4a1a7a8" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://www.vulncheck.com/advisories/libssh2-out-of-bounds-write-via-unchecked-packet-length-in-transport-c" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1996.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1996" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-3CFQ-4XX4-RMPG" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-R8MH-X5QV-7GG2" }, { "category": "external", "summary": "Reference - osv", "url": "https://ubuntu.com/security/CVE-2026-55200" }, { "category": "external", "summary": "Reference - osv; redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-55200" }, { "category": "external", "summary": "Reference - osv", "url": "https://security.alpinelinux.org/vuln/CVE-2026-55200" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55200" } ], "remediations": [ { "category": "mitigation", "details": "The primary mitigation is strict network access control. Ensure libssh2 clients only connect to trusted SSH servers, and use firewalls to block untrusted incoming connections if libssh2 is deployed as a server-side application.", "product_ids": [ "CSAFPID-1439315", "CSAFPID-1439321", "CSAFPID-3106288", "CSAFPID-3106289", "CSAFPID-6014972", "CSAFPID-8490068" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1439315", "CSAFPID-1439321", "CSAFPID-3106288", "CSAFPID-3106289", "CSAFPID-6014972", "CSAFPID-6453846", "CSAFPID-6453847", "CSAFPID-7765691", "CSAFPID-7765692", "CSAFPID-7765693", "CSAFPID-7765694", "CSAFPID-7765695", "CSAFPID-7765697", "CSAFPID-7765698", "CSAFPID-7765700", "CSAFPID-7765701", "CSAFPID-7765951", "CSAFPID-7765952", "CSAFPID-7765953", "CSAFPID-7765954", "CSAFPID-7765955", "CSAFPID-7765956", "CSAFPID-7765957", "CSAFPID-7765958", "CSAFPID-7765959", "CSAFPID-7765960", "CSAFPID-7765961", "CSAFPID-7765962", "CSAFPID-7765963", "CSAFPID-7765964", "CSAFPID-7765965", "CSAFPID-7765966", "CSAFPID-7765967", "CSAFPID-7765968", "CSAFPID-7765969", "CSAFPID-7765970", "CSAFPID-7765971", "CSAFPID-7765972", "CSAFPID-7765973", "CSAFPID-7765974", "CSAFPID-8474292", "CSAFPID-8476803", "CSAFPID-8476804", "CSAFPID-8480426", "CSAFPID-8480427", "CSAFPID-8480428", "CSAFPID-8480429", "CSAFPID-8480430", "CSAFPID-8480431", "CSAFPID-8489632", "CSAFPID-8489633", "CSAFPID-8489634", "CSAFPID-8489635", "CSAFPID-8490068" ] } ], "title": "CVE-2026-55200" } ] }