{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-82465", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-29T14:11:01.638Z", "datePublished": "2026-08-29T16:35:28.321Z", "dateUpdated": "2026-08-29T16:35:28.321Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-29T16:35:28.321Z"}, "datePublic": "2026-08-24T00:00:00.000Z", "title": "pac4j-saml before 6.5.6 Session Destruction via Unsigned LogoutRequest", "descriptions": [{"lang": "en", "value": "pac4j-saml before 6.5.6 does not require signature validation of SAML LogoutRequest messages in SAML2LogoutValidator.validateLogoutRequest(). When an IdP sends no SessionIndex, a session can be destroyed based solely on the NameID, allowing an unauthenticated attacker to submit an unsigned LogoutRequest with a guessed identifier (e.g., an email address used as NameID) to terminate a victim's SAML session."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Insufficient Verification of Data Authenticity", "cweId": "CWE-345", "type": "CWE"}]}], "affected": [{"vendor": "pac4j", "product": "pac4j", "defaultStatus": "unaffected", "packageURL": "pkg:maven/org.pac4j/pac4j-parent", "versions": [{"version": "0", "lessThan": "6.5.6", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.5.6"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e", "tags": ["patch"], "name": "Patch Commit"}, {"url": "https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html", "tags": ["vendor-advisory"], "name": "pac4j Security Advisory for pac4j-core, pac4j-oidc and pac4j-saml"}, {"url": "https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-saml/src/main/java/org/pac4j/saml/logout/impl/SAML2LogoutValidator.java", "tags": ["technical-description"]}, {"url": "https://github.com/pac4j/pac4j", "tags": ["product"]}, {"name": "VulnCheck Advisory: pac4j-saml before 6.5.6 Session Destruction via Unsigned LogoutRequest", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/pac4j-saml-before-6.5.6-session-destruction-via-unsigned-logoutrequest"}], "credits": [{"lang": "en", "value": "Joshua Rogers (AISLE Research)", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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