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No exploitation reportedAwaiting NVD analysis

CVE-2026-123550

OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions

No exploitation reported by the sources we read.

  • Published2026-11-08
  • WeaknessCWE-290

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-11-0801:37CVE publishedCNA

Versions per branch

Products declared by the CNA

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • OpenIdentityPlatform OpenAMother versions: not affected
    Affected
    • < 16.1.4fixed in 16.1.4semver

    Not affected = 16.1.4

  • OpenIdentityPlatform OpenAMother versions: not affected
    Affected
    • < 16.1.4fixed in 16.1.4semver

    Not affected = 16.1.4

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-08

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-123550 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 4.09.32026-11-08
  • CNACVSS 3.19.82026-11-08
  • NVDCVSS 3.19.8read 2026-11-08
  • CNAweakness (CWE)CWE-2902026-11-08
  • NVDweakness (CWE)CWE-290read 2026-11-08

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-11-08
Last Modified
2026-11-08
NVD status
Received

Frequently asked questions

What is CVE-2026-123550?

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.

Is CVE-2026-123550 actively exploited?

Active exploitation of CVE-2026-123550 has not been confirmed.

What is the CVSS score for CVE-2026-123550?

CVE-2026-123550 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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