CVE-2026-123538: high-severity vulnerability in OpenIdentityPlatform OpenAM
OpenAM before 16.1.4 SAML 1.x Signature Verification Issuer Impersonation
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.1%
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.
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
Affected products
OpenIdentityPlatform · OpenAMRelated CVEs — OpenIdentityPlatform OpenAM
In the same product, most dangerous first.
CVE-2026-33439CRITICALPre-Authentication Remote Code Execution via `jato.clientSession` Deserialization in OpenAMEPSS 9.3%CVE-2024-41667HIGHOpenAM FreeMarker template injectionEPSS 3.5%CVE-2023-37471CRITICALUser impersonation using SAMLv1.x SSO in Open Access Management EPSS 1.3%CVE-2026-62379CRITICALOpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCustomCallbackEPSS 1.1%CVE-2026-46619CRITICALOpenAM Authentication Bypass via MSISDN LDAP InjectionEPSS 1.0%CVE-2026-62263CRITICALOpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypassEPSS 0.9%