CVE-2026-123550 OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions

CriticalCVSS 9.3

Published: 2026-11-08 03:37
Updated: 2026-11-09 15:58
Exploit status: No public exploit known

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.

Affected products

Product	Affected versions	Fixed in
org.openidentityplatform.openam/openam-federation-library	< 16.1.4	16.1.4
org.openidentityplatform.openam/openam-auth-saml2	< 16.1.4	16.1.4

References

GitHub Security Advisory (GHSA-3j2f-qhrc-rjfj) vendor-advisory
VulnCheck Advisory: OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions third-party-advisory

CVSS v4.0

9.3 Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable System Confidentiality: High
Vulnerable System Integrity: High
Vulnerable System Availability: High
Subsequent System Confidentiality: None
Subsequent System Integrity: None
Subsequent System Availability: None

All scores (2)

v4.0 9.3 · vulncheck
v3.1 9.8 · vulncheck

Weakness & likelihood

EPSS (exploitation probability, 30 days): Not available
CWE: CWE-290 Authentication Bypass by Spoofing

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

No public exploit references known.