{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123538", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-06T00:48:46.279Z", "datePublished": "2026-11-08T01:37:45.221Z", "dateUpdated": "2026-11-08T01:37:45.221Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-08T01:37:45.221Z"}, "datePublic": "2026-10-22T00:00:00.000Z", "title": "OpenAM before 16.1.4 SAML 1.x Signature Verification Issuer Impersonation", "descriptions": [{"lang": "en", "value": "OpenAM before 16.1.4 does not verify that a signed SAML 1.x assertion or response was signed by the partner named as its issuer, accepting a signature from any certificate in OpenAM's keystore. An attacker holding such a private key, such as a trusted SAML 1.x partner, can forge assertions claiming another partner's issuer and sign in as that partner's users, including privileged ones."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Verification of Cryptographic Signature", "cweId": "CWE-347", "type": "CWE"}]}], "affected": [{"vendor": "OpenIdentityPlatform", "product": "OpenAM", "defaultStatus": "unaffected", "packageURL": "pkg:maven/org.openidentityplatform.openam/openam-federation-library", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "16.1.4"}, {"version": "16.1.4", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openidentityplatform:openam:*:*:*:*:*:*:*:*", "versionEndExcluding": "16.1.4"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 6.6, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-j56q-q3r3-hg7f", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-j56q-q3r3-hg7f)"}, {"name": "VulnCheck Advisory: OpenAM before 16.1.4 SAML 1.x Signature Verification Issuer Impersonation", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-1-x-signature-verification-issuer-impersonation"}], "credits": [{"lang": "en", "value": "isazajuancarlos", "type": "reporter"}, {"lang": "en", "value": "vharseko", "type": "remediation developer"}, {"lang": "en", "value": "maximthomas", "type": "remediation reviewer"}, {"lang": "en", "value": "tsujiguchitky", "type": "remediation reviewer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}