What is GHSA-r583-mmgv-j5q5?

GHSA-r583-mmgv-j5q5 is a security advisory published by GitHub Security Advisories with Medium severity. Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to disclose...

Which CVE IDs does GHSA-r583-mmgv-j5q5 cover?

GHSA-r583-mmgv-j5q5 covers the following CVE IDs: CVE-2026-50678. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-r583-mmgv-j5q5?

GHSA-r583-mmgv-j5q5 has a CVSS v3 base score of 6.6, published by GitHub Security Advisories.

GHSA-r583-mmgv-j5q5MediumCVSS 6.6

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to disclose...

Vendor

GitHub Security Advisories

Published

July 14, 2026

Last Modified

July 14, 2026

🔗 CVE IDs covered (1)

CVE-2026-50678 →

📋 Description

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-50678
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50678
https://github.com/advisories/GHSA-r583-mmgv-j5q5