---
id: CVE-2026-123550
title: OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions
summary: >-
  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
  remo…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-290
vendor: OpenIdentityPlatform
product: OpenAM
affected:
  - OpenAM < 16.1.4
  - OpenAM < 16.1.4
published: '2026-11-08'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T01:37:54.178Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123550'
references:
  - url: >-
      https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-3j2f-qhrc-rjfj
    label: GitHub Security Advisory (GHSA-3j2f-qhrc-rjfj)
  - url: >-
      https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-authentication-bypass-via-unsigned-assertions
    label: >-
      VulnCheck Advisory: OpenAM before 16.1.4 SAML Authentication Bypass via
      Unsigned Assertions
tags:
  - cve.org
ingestedAt: '2026-11-08T02:43:18.671Z'
---

## Overview

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

- `OpenAM < 16.1.4`
- `OpenAM < 16.1.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.