What is GHSA-hwmf-9wj8-35pw?

GHSA-hwmf-9wj8-35pw is a security advisory published by GitHub Security Advisories with Medium severity. libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE...

Which CVE IDs does GHSA-hwmf-9wj8-35pw cover?

GHSA-hwmf-9wj8-35pw covers the following CVE IDs: CVE-2026-26824. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-hwmf-9wj8-35pw?

GHSA-hwmf-9wj8-35pw has a CVSS v3 base score of 6.5, published by GitHub Security Advisories.

GHSA-hwmf-9wj8-35pwMediumCVSS 6.5

libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE...

Vendor

GitHub Security Advisories

Published

June 3, 2026

Last Modified

June 4, 2026

🔗 CVE IDs covered (1)

CVE-2026-26824 →

📋 Description

libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-26824
https://github.com/libxls/libxls/issues/155
https://github.com/advisories/GHSA-hwmf-9wj8-35pw