MEDIUM 6.5 Microsoft
CVE-2026-56409
xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
Microsoft Security Update 2026-Jun: xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
Affected Products
- azl3 expat 2.6.4-6 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56409
- https://nvd.nist.gov/vuln/detail/CVE-2026-56409
This medium severity vulnerability with a CVSS score of 6.5 was published on 2026-06-09 via Microsoft. Affected: azl3 expat 2.6.4-6 on Azure Linux 3.0.
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