What is CVE-2026-56409?

CVE-2026-56409 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.

Which CVE IDs does CVE-2026-56409 cover?

CVE-2026-56409 covers the following CVE IDs: CVE-2026-56409. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-56409?

CVE-2026-56409 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

CVE-2026-56409MediumCVSS 6.5

xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-56409 →