What is GHSA-fw78-6h4w-3537?

GHSA-fw78-6h4w-3537 is a security advisory published by GitHub Security Advisories with Critical severity. Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network.

Which CVE IDs does GHSA-fw78-6h4w-3537 cover?

GHSA-fw78-6h4w-3537 covers the following CVE IDs: CVE-2026-66801. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-fw78-6h4w-3537?

GHSA-fw78-6h4w-3537 has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-fw78-6h4w-3537CriticalCVSS 9.8

Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network.

Vendor

GitHub Security Advisories

Published

November 10, 2026

Last Modified

November 10, 2026

🔗 CVE IDs covered (1)

CVE-2026-66801 →

📋 Description

Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-66801
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66801
https://github.com/advisories/GHSA-fw78-6h4w-3537