What is GHSA-mp23-5v8j-rg6j?

GHSA-mp23-5v8j-rg6j is a security advisory published by GitHub Security Advisories with High severity. Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Which CVE IDs does GHSA-mp23-5v8j-rg6j cover?

GHSA-mp23-5v8j-rg6j covers the following CVE IDs: CVE-2026-55036. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-mp23-5v8j-rg6j?

GHSA-mp23-5v8j-rg6j has a CVSS v3 base score of 7.8, published by GitHub Security Advisories.

GHSA-mp23-5v8j-rg6jHighCVSS 7.8

Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Vendor

GitHub Security Advisories

Published

July 14, 2026

Last Modified

July 14, 2026

🔗 CVE IDs covered (1)

CVE-2026-55036 →

📋 Description

Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-55036
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55036
https://github.com/advisories/GHSA-mp23-5v8j-rg6j