What is GHSA-f9mm-fxrq-6c5v?

GHSA-f9mm-fxrq-6c5v is a security advisory published by GitHub Security Advisories with Critical severity. OpenAM before 16.1.4 contains an authentication bypass vulnerability in its SAML v2.0 service...

Which CVE IDs does GHSA-f9mm-fxrq-6c5v cover?

GHSA-f9mm-fxrq-6c5v covers the following CVE IDs: CVE-2026-123550. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-f9mm-fxrq-6c5v?

GHSA-f9mm-fxrq-6c5v has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-f9mm-fxrq-6c5vCriticalCVSS 9.8

OpenAM before 16.1.4 contains an authentication bypass vulnerability in its SAML v2.0 service...

Vendor

GitHub Security Advisories

Published

November 8, 2026

Last Modified

November 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-123550 →

📋 Description

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.

🔗 References (4)

https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-3j2f-qhrc-rjfj
https://nvd.nist.gov/vuln/detail/CVE-2026-123550
https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-authentication-bypass-via-unsigned-assertions
https://github.com/advisories/GHSA-f9mm-fxrq-6c5v