Critical severity9.8NVD Advisory· Published Nov 8, 2026

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Openidentityplatform/Openamllm-fuzzy
Range: <16.1.4

Patches

Vulnerability mechanics

References

github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-3j2f-qhrc-rjfjnvd
www.vulncheck.com/advisories/openam-before-16.1.4-saml-authentication-bypass-via-unsigned-assertionsnvd

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cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000