{"id":"CVE-2026-123538","aliases":[],"cve":{"records":[{"id":"CVE-2026-123538","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T00:48:46.279Z","published":"2026-11-08T01:37:45.221Z","modified":"2026-11-09T13:57:23.968Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-08T01:37:45.221Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-09T13:57:23.968Z"}],"references":[{"url":"https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-j56q-q3r3-hg7f","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-1-x-signature-verification-issuer-impersonation","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-347","description":"Improper Verification of Cryptographic Signature","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:openidentityplatform:openam:*:*:*:*:*:*:*:*","versionEndExcluding":"16.1.4"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-09T13:57:14.980790Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"OpenAM before 16.1.4 SAML 1.x Signature Verification Issuer Impersonation","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"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ones.","score":7.5,"severity":"high","published":"2026-11-08T01:37:45.221Z","modified":"2026-11-09T13:57:23.968Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"OpenIdentityPlatform","name":"OpenAM","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"16.1.4","versionType":"semver"},{"version":"16.1.4","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:maven/org.openidentityplatform.openam/openam-federation-library","packageIdentity":{"ecosystem":"Maven","name":"org.openidentityplatform.openam:openam-federation-library"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123538"}],"remediation":[],"references":["https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-j56q-q3r3-hg7f","https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-1-x-signature-verification-issuer-impersonation"],"sources":[{"name":"CVE","id":"CVE-2026-123538","modified":"2026-11-09T13:57:23.968Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123538"}],"assessments":[{"source":"VulnCheck","vector":"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","score":7.5},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","score":6.6}],"sourceAffected":[],"observedAt":"2026-11-09T14:00:38.419Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T05:05:31.892Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-08T03:30:33.698Z","attemptedAt":"2026-11-08T03:30:33.698Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-08T03:30:33.944Z","attemptedAt":"2026-11-08T03:30:33.944Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-08T03:30:34.272Z","attemptedAt":"2026-11-08T03:30:34.272Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-08T03:30:33.873Z","attemptedAt":"2026-11-08T03:30:33.873Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-123538","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123538","modified":"2026-11-08T02:16:44.460","score":7.5,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-08T03:30:33.698Z"},{"source":"NVD","id":"CVE-2026-123538","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123538","modified":"2026-11-08T02:16:44.460","score":6.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-08T03:30:33.698Z"},{"source":"ENISA EUVD","id":"EUVD-2026-119423","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119423","modified":"Nov 8, 2026, 1:37:45 AM","score":7.5,"vector":"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","checkedAt":"2026-11-08T03:30:34.272Z"}],"aiSummary":{"text":"OpenAM before 16.1.4 is vulnerable to issuer impersonation due to improper verification of SAML 1.x signatures. An attacker with a private key can forge assertions and sign in as another partner's users. The weakness is in the acceptance of signatures from any certificate in OpenAM's keystore.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-08T02:26:02.751Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123538"}]}}