CVE-2026-123550 OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-123550?
CVE-2026-123550 is a critical vulnerability in OpenIdentityPlatform OpenAM, published on 8 Nov 2026.
Official 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.
Weakness: CWE-290
Which versions are affected by CVE-2026-123550?
How do I fix CVE-2026-123550?
No fix has been published for CVE-2026-123550 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-123550 being exploited?
There is no known exploitation of CVE-2026-123550 in the wild and no public exploit code.
Sources
Also known as GHSA-3j2f-qhrc-rjfj, GHSA-f9mm-fxrq-6c5v.