Paper/Archive/CVE-2026-123550

CVE-2026-123550

OpenIdentityPlatform OpenAM — OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 46.8.468 × 209.4 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

OpenAM before 16.1.4 contains an authentication bypass vulnerability in its SAML v2.0 service provider that accepts unsigned assertions on the ECP (PAOS) and HTTP-Artifact bindings when WantAssertionsSigned is false. Unauthenticated remote attackers can submit forged assertions to obtain sessions as any mapped user, including administrators, and hijack single sign-on to dependent applications.

Affected

ProductAffectedFixed inSource

OpenAM< 16.1.416.1.4CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

advisorygithub.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-3j2f-qhrc-rjfj writeupvulncheck.com/advisories/openam-before-16.1.4-saml-authentication-bypass-via-unsigned-assertions