HIGH 8.0 Microsoft

CVE-2026-86140

In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.

Microsoft Security Update 2026-Sep: In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.

Affected Products

azl3 libxml2 2.11.5-10 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-86140
https://nvd.nist.gov/vuln/detail/CVE-2026-86140

Published: 2026-09-08 · Source: Microsoft · Feed updated: 2026-10-20

This high severity vulnerability with a CVSS score of 8.0 was published on 2026-09-08 via Microsoft. Affected: azl3 libxml2 2.11.5-10 on Azure Linux 3.0.

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