CVE-2026-123538
OpenAM before 16.1.4 SAML 1.x Signature Verification Issuer Impersonation
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| OpenAM OpenIdentityPlatform org.openidentityplatform.openam/openam-federation-library
maven |
≥ 0; < 16.1.4 (affected, semver) 16.1.4 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.5 high |
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 | CNA: VulnCheck |
| 3.1 / 6.6 medium |
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | CNA: VulnCheck |
| 4.0 / 7.5 high |
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 | NVD: [email protected] |
| 3.1 / 6.6 medium |
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-j56q-q3r3-hg7fCNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-1-x-signature-verification-issuer-impersonationCNA: VulnCheck · third-party-advisory
- https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-j56q-q3r3-hg7f[email protected]
- https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-1-x-signature-verification-issuer-impersonation[email protected]
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