What is GHSA-r9hf-26xj-x88v?

GHSA-r9hf-26xj-x88v is a security advisory published by GitHub Security Advisories with Critical severity. Improper verification of cryptographic signature in Copilot Studio allows an unauthorized...

Which CVE IDs does GHSA-r9hf-26xj-x88v cover?

GHSA-r9hf-26xj-x88v covers the following CVE IDs: CVE-2026-80098. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-r9hf-26xj-x88v?

GHSA-r9hf-26xj-x88v has a CVSS v3 base score of 9.3, published by GitHub Security Advisories.

GHSA-r9hf-26xj-x88vCriticalCVSS 9.3

Improper verification of cryptographic signature in Copilot Studio allows an unauthorized...

Vendor

GitHub Security Advisories

Published

September 4, 2026

Last Modified

September 4, 2026

🔗 CVE IDs covered (1)

CVE-2026-80098 →

📋 Description

Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-80098
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098
https://github.com/advisories/GHSA-r9hf-26xj-x88v