What is GHSA-vw9v-mpfh-qwg3?

GHSA-vw9v-mpfh-qwg3 is a security advisory published by GitHub Security Advisories with High severity. A flaw was found in Picketlink's SP signature validation; a SAML response containing zero...

Which CVE IDs does GHSA-vw9v-mpfh-qwg3 cover?

GHSA-vw9v-mpfh-qwg3 covers the following CVE IDs: CVE-2026-15556. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-vw9v-mpfh-qwg3?

GHSA-vw9v-mpfh-qwg3 has a CVSS v3 base score of 8.1, published by GitHub Security Advisories.

GHSA-vw9v-mpfh-qwg3HighCVSS 8.1

A flaw was found in Picketlink's SP signature validation; a SAML response containing zero...

Vendor

GitHub Security Advisories

Published

August 11, 2026

Last Modified

August 12, 2026

🔗 CVE IDs covered (1)

CVE-2026-15556 →

📋 Description

A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application.

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2026-15556
https://access.redhat.com/security/cve/CVE-2026-15556
https://bugzilla.redhat.com/show_bug.cgi?id=2483121
https://access.redhat.com/errata/RHSA-2026:53644
https://access.redhat.com/errata/RHSA-2026:53806
https://github.com/advisories/GHSA-vw9v-mpfh-qwg3