What is GHSA-w7qh-jvr9-qmx9?

GHSA-w7qh-jvr9-qmx9 is a security advisory published by GitHub Security Advisories with Critical severity. Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform...

Which CVE IDs does GHSA-w7qh-jvr9-qmx9 cover?

GHSA-w7qh-jvr9-qmx9 covers the following CVE IDs: CVE-2026-56191. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-w7qh-jvr9-qmx9?

GHSA-w7qh-jvr9-qmx9 has a CVSS v3 base score of 10.0, published by GitHub Security Advisories.

GHSA-w7qh-jvr9-qmx9CriticalCVSS 10.0

Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform...

Vendor

GitHub Security Advisories

Published

July 24, 2026

Last Modified

July 24, 2026

🔗 CVE IDs covered (1)

CVE-2026-56191 →

📋 Description

Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-56191
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56191
https://github.com/advisories/GHSA-w7qh-jvr9-qmx9