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.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: CRITICAL
CVSS score: 9.3 / 10
CVSS 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
Effective score: 9.3 / 10 CRITICAL source: CNA overview
CWE(s): CWE-290
Reserved: 2026-11-06
Published: 2026-11-08 01:37 UTC
Last updated: 2026-11-08 01:37 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/123xxx/CVE-2026-123550.json
Linked Threat: CVE-2026-123550 — OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-119435

EUVD enrichment is queued; refresh the page in a few seconds.

Affected products (2)

Vendor	Product	Versions	Platforms
OpenIdentityPlatform	OpenAM	`0` (affected), `16.1.4` (unaffected)	—
OpenIdentityPlatform	OpenAM	`0` (affected), `16.1.4` (unaffected)	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

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

MITRE references (2) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

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

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

October 2026 Critical Patch Update Released | security

web:blogs.oracle.com

For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

2026-11-08 10:25 UTC
September 2026 Critical Security Patch Update Released

web:blogs.oracle.com

For more information about the Critical Security Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

2026-11-08 10:25 UTC
CVE-2026-123550 - Overview, Insights & Trends

web:cvemon.intruder.io

Get the latest on CVE-2026-123550 , including risk score and recommendations. Vulnerability intelligence on trending CVEs from multiple sources.

2026-11-08 10:25 UTC
CVE Vulnerabilities 2026: Critical Flaws & Fixes Hub

web:cyberupdates365.com

Track critical CVE vulnerabilities 2026 with verified enterprise patch guides. Fix zero-days across VMware, WordPress, Windows, and cloud infrastructure.

2026-11-08 10:25 UTC
CVE-2026-123550: OpenAM · Authentication Bypass by Spoofing | Threat Radar

web:radar.offseq.com

OpenAM versions before 16.1.4 have an authentication bypass vulnerability in the SAML v2.0 service provider. This flaw allows unauthenticated remote attackers…

2026-11-08 10:25 UTC
Microsoft Patch Tracker (November 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-11-08 10:25 UTC
ArcGIS Server Security 2026 Update 2 Patch - Esri Support

web:support.esri.com

This patch deals specifically with the issues listed below under Issues addressed with this patch . As part of the patch installation, the ArcGIS Server service is stopped and restarted. The restart may take several minutes depending on the number of services published on the ArcGIS Server site. This patch can be uninstalled as outlined in the Uninstalling this patch on Windows and Uninstalling ...

2026-11-08 10:25 UTC
SAP Security Patch Day - October 2026

web:support.sap.com

On 13 th of October 2026 , SAP security patch day saw the release of 16 new security notes and 4 GitHub security advisories. There are 2 updates to previously released security notes.

2026-11-08 10:25 UTC
Oracle Critical Security Patch Update Advisory - September 2026

web:www.oracle.com

Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.

2026-11-08 10:25 UTC
CVE-2026-123550: OpenAM SAML v2.0 Authentication Bypass Enables ...

web:www.thehackerwire.com

A critical authentication bypass ( CVE-2026-123550 ) in OpenAM before 16.1.4's SAML v2.0 service provider allows unauthenticated remote attackers to forge assertions. This flaw grants session hijacking capabilities for any mapped user, including administrators, and enables single sign-on compromise across dependent applications.

2026-11-08 10:25 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-123550.json.

{
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    "dateReserved": "2026-11-06T00:49:30.576Z",
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