---
id: "CVE-2026-123550"
page: "https://infrastack.ai/live/CVE-2026-123550"
kind: "vulnerability"
aliases: ["CVE-2026-123550"]
title: "OpenAM: SAML flaw lets attackers forge logins as any user"
severity: "critical"
cvss: 9.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "openam", "saml", "self-hosted", "sso"]
not_affected_if: ["version-16.1.4-or-later", "wantassertionssigned-true"]
published_at: "2026-11-08T02:16:46+00:00"
first_seen_at: "2026-11-08T02:21:11+00:00"
updated_at: "2026-11-08T02:22:34+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123550", "first_seen_at": "2026-11-08T02:21:11+00:00"}]
exploit_sources: []
---

# OpenAM: SAML flaw lets attackers forge logins as any user

Link for people: https://infrastack.ai/live/CVE-2026-123550 (this .md is for agents)

OpenAM before 16.1.4 accepts unsigned SAML assertions on the ECP (PAOS) and HTTP-Artifact bindings when WantAssertionsSigned is false. An unauthenticated remote attacker can submit forged assertions and obtain sessions as any mapped user, including administrators, and hijack single sign-on to dependent applications.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the OpenAM version in use; `16.1.4` or later is not affected by the description given
- Check whether `WantAssertionsSigned` is set to false on the SAML v2.0 service provider configuration

## Fix

- OpenAM: move to `16.1.4` or later

## Timeline

- 2026-11-08T02:21:11+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123550

## Documents

- [advisory] Vendor advisory: github.com https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-3j2f-qhrc-rjfj
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/openam-before-16.1.4-saml-authentication-bypass-via-unsigned-assertions

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_