What is GHSA-9jq5-63hm-6q5g?

GHSA-9jq5-63hm-6q5g is a security advisory published by GitHub Security Advisories with Medium severity. libexpat before 2.8.2 has an integer overflow in copyString.

Which CVE IDs does GHSA-9jq5-63hm-6q5g cover?

GHSA-9jq5-63hm-6q5g covers the following CVE IDs: CVE-2026-56408. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-9jq5-63hm-6q5g?

GHSA-9jq5-63hm-6q5g has a CVSS v3 base score of 6.9, published by GitHub Security Advisories.

GHSA-9jq5-63hm-6q5gMediumCVSS 6.9

libexpat before 2.8.2 has an integer overflow in copyString.

Vendor

GitHub Security Advisories

Published

June 21, 2026

Last Modified

June 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-56408 →

📋 Description

libexpat before 2.8.2 has an integer overflow in copyString.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-56408
https://github.com/libexpat/libexpat/commit/16e2efd867ea8567ffa012210b52ef5918e20817
https://github.com/advisories/GHSA-9jq5-63hm-6q5g