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.
Published: 2026-11-08
Score: 9.3 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sun, 08 Nov 2026 01:45:00 +0000

Type Values Removed Values Added
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.
Title OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions
First Time appeared Openidentityplatform
Openidentityplatform openam
Weaknesses CWE-290
CPEs cpe:2.3:a:openidentityplatform:openam:*:*:*:*:*:*:*:*
Vendors & Products Openidentityplatform
Openidentityplatform openam
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': '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'}


Subscriptions

Openidentityplatform Openam
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-08T01:37:54.178Z

Reserved: 2026-11-06T00:49:30.576Z

Link: CVE-2026-123550

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-08T02:16:46.410

Modified: 2026-11-08T02:16:46.410

Link: CVE-2026-123550

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-08T06:15:14Z

Weaknesses