{
    "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": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "6.5.6"
                                }
                            ]
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                        "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"
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                        "attackVector": "NETWORK",
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                        "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": [
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                    "name": "pac4j Security Advisory for pac4j-core, pac4j-oidc and pac4j-saml"
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                    "tags": [
                        "technical-description"
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                },
                {
                    "url": "https://github.com/pac4j/pac4j",
                    "tags": [
                        "product"
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                },
                {
                    "name": "VulnCheck Advisory: pac4j-saml before 6.5.6 Session Destruction via Unsigned LogoutRequest",
                    "tags": [
                        "third-party-advisory"
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                    "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"
                }
            ],
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                "engine": "vulncheck-endgame"
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}