{ "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-2026-56425", "tracking": { "current_release_date": "2026-06-29T08:10:00.796276Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-56425", "initial_release_date": "2026-06-22T14:39:46.298152Z", "revision_history": [ { "date": "2026-06-22T14:39:46.298152Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (1).| CWES updated (1)." }, { "date": "2026-06-22T14:39:47.834582Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-06-22T15:35:33.547564Z", "number": "3", "summary": "NCSC Score updated." }, { "date": "2026-06-23T04:06:17.262051Z", "number": "4", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (1).| CWES updated (1)." }, { "date": "2026-06-23T04:06:26.609507Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-06-23T09:05:47.391198Z", "number": "6", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (9)." }, { "date": "2026-06-23T09:05:49.736700Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-06-23T14:53:45.868934Z", "number": "8", "summary": "Unknown change." }, { "date": "2026-06-23T14:53:48.268514Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-06-23T16:27:42.584458Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-06-23T16:27:44.407913Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-06-26T22:26:27.817363Z", "number": "12", "summary": "CVSS created.| Products connected (1).| Product Identifiers created (1)." }, { "date": "2026-06-26T22:26:31.873375Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-06-29T08:09:57.980717Z", "number": "14", "summary": "Source connected.| CVE status created. (valid)" } ], "status": "interim", "version": "14" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.5.42", "product": { "name": "vers:unknown/<2.5.42", "product_id": "CSAFPID-8489460", "product_identification_helper": { "cpe": "cpe:2.3:a:misp-project:misp:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "MISP" }, { "branches": [ { "category": "product_version_range", "name": "vers:semver/<=2.5.41", "product": { "name": "vers:semver/<=2.5.41", "product_id": "CSAFPID-8484457" } } ], "category": "product_name", "name": "misp" } ], "category": "vendor", "name": "MISP" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.5.42", "product": { "name": "vers:unknown/<2.5.42", "product_id": "CSAFPID-8488447" } } ], "category": "product_name", "name": "MISP" } ], "category": "vendor", "name": "Open Source" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-56425", "cwe": { "id": "CWE-384", "name": "Session Fixation" }, "notes": [ { "category": "description", "text": "The Azure Active Directory (AAD) authentication implementation contained multiple weaknesses in its OAuth 2.0 authorization flow that could allow attackers to bypass important security guarantees provided by the protocol.\n\n\nThe application used the PHP session identifier (session_id()) as the OAuth state parameter. Because session identifiers are long-lived authentication credentials, exposing them in OAuth redirect URLs could leak valid session tokens through browser history, HTTP Referer headers, reverse proxies, access logs, or third-party infrastructure involved in the authentication flow. If obtained by an attacker, the leaked session identifier could potentially be used for session hijacking.\n\n\nAdditionally, the implementation did not regenerate the session identifier after successful authentication, leaving authenticated sessions susceptible to session fixation attacks where an attacker forces a victim to use a known session identifier before login and later reuses that identifier after authentication.\n\n\nThe OAuth state value was also not implemented as a dedicated, single-use nonce. This weakened CSRF protections and increased the risk of replay attacks against the OAuth callback process.\n\n\nThe authentication flow further failed to enforce HTTPS for the configured OAuth redirect URI. If a non-HTTPS redirect URI was used, OAuth authorization codes and access tokens could traverse the network in plaintext, exposing sensitive credentials to network attackers.\n\n\nFinally, OAuth error responses containing attacker-controlled GET parameters were logged verbatim. An attacker could inject control characters or crafted log content, leading to log forging, log injection, or corruption of audit records.\n\n\nThe fix introduces:\n\n\n\n * \nA dedicated cryptographically random OAuth state value.\n\n\n * \nSingle-use state validation and invalidation.\n\n\n * \nConstant-time state comparison using hash_equals().\n\n\n * \nSession identifier rotation after successful authentication.\n\n\n * \nEnforcement of HTTPS-only redirect URIs.\n\n\n * \nSanitized and length-limited logging of OAuth error parameters.\n\n\nAAD Authentication Plugin (OAuth 2.0 / Azure Active Directory integration)", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/56xxx/CVE-2026-56425.json" }, { "category": "description", "text": "The Azure Active Directory (AAD) authentication implementation contained multiple weaknesses in its OAuth 2.0 authorization flow that could allow attackers to bypass important security guarantees provided by the protocol.\n\n\nThe application used the PHP session identifier (session_id()) as the OAuth state parameter. Because session identifiers are long-lived authentication credentials, exposing them in OAuth redirect URLs could leak valid session tokens through browser history, HTTP Referer headers, reverse proxies, access logs, or third-party infrastructure involved in the authentication flow. If obtained by an attacker, the leaked session identifier could potentially be used for session hijacking.\n\n\nAdditionally, the implementation did not regenerate the session identifier after successful authentication, leaving authenticated sessions susceptible to session fixation attacks where an attacker forces a victim to use a known session identifier before login and later reuses that identifier after authentication.\n\n\nThe OAuth state value was also not implemented as a dedicated, single-use nonce. This weakened CSRF protections and increased the risk of replay attacks against the OAuth callback process.\n\n\nThe authentication flow further failed to enforce HTTPS for the configured OAuth redirect URI. If a non-HTTPS redirect URI was used, OAuth authorization codes and access tokens could traverse the network in plaintext, exposing sensitive credentials to network attackers.\n\n\nFinally, OAuth error responses containing attacker-controlled GET parameters were logged verbatim. An attacker could inject control characters or crafted log content, leading to log forging, log injection, or corruption of audit records.\n\n\nThe fix introduces:\n\n\n\n * \nA dedicated cryptographically random OAuth state value.\n\n\n * \nSingle-use state validation and invalidation.\n\n\n * \nConstant-time state comparison using hash_equals().\n\n\n * \nSession identifier rotation after successful authentication.\n\n\n * \nEnforcement of HTTPS-only redirect URIs.\n\n\n * \nSanitized and length-limited logging of OAuth error parameters.\n\n\nAAD Authentication Plugin (OAuth 2.0 / Azure Active Directory integration)", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56425" }, { "category": "other", "text": "0.00303", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "title": "CVSSV4" }, { "category": "other", "text": "9.3", "title": "CVSSV4 base score" }, { "category": "other", "text": "6.7", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Nvd, There is product data available from source Certbundde, The value of the mean historic EPSS score, The value of the most recent EPSS score", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to (a version of) an uncommon product", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-8484457", "CSAFPID-8488447", "CSAFPID-8489460" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/56xxx/CVE-2026-56425.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-56425" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2035.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://advisories.ncsc.nl/advisory?id=NCSC-2026-0213" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://github.com/MISP/MISP/commit/146bc40ad6e10a44f01e8ed62d5f7bc9c06cc4fa" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2035.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2035" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/MISP/MISP/releases/tag/v2.5.42" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-834x-pvxg-xh58" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-7v9f-64q7-x2jg" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-ch28-mjgc-m4wr" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-r3v6-qw6x-wf6h" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-3vhv-jx5j-gj6p" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-MF7V-X7R6-FQ57" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-8484457", "CSAFPID-8488447", "CSAFPID-8489460" ] } ], "title": "CVE-2026-56425" } ] }