What is GHSA-638v-9w3r-gh6q?

GHSA-638v-9w3r-gh6q is a security advisory published by GitHub Security Advisories with Medium severity. xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.

Which CVE IDs does GHSA-638v-9w3r-gh6q cover?

GHSA-638v-9w3r-gh6q covers the following CVE IDs: CVE-2026-56410. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-638v-9w3r-gh6q?

GHSA-638v-9w3r-gh6q has a CVSS v3 base score of 6.9, published by GitHub Security Advisories.

GHSA-638v-9w3r-gh6qMediumCVSS 6.9

xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.

Vendor

GitHub Security Advisories

Published

June 21, 2026

Last Modified

June 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-56410 →

📋 Description

xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-56410
https://github.com/libexpat/libexpat/pull/1252
https://github.com/advisories/GHSA-638v-9w3r-gh6q