{"id":"CVE-2026-123538","published":"2026-11-08T02:16:44.460","lastModified":"2026-11-10T22:13:29.767","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.","cvssScore":6.6,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-347"],"vendors":[],"products":[],"references":[{"url":"https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-j56q-q3r3-hg7f","tags":[]},{"url":"https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-1-x-signature-verification-issuer-impersonation","tags":[]}],"exploitRefs":[{"url":"https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-j56q-q3r3-hg7f","tags":[]}],"hasPoc":true,"ai":null}