CVE-2026-86140 | xmlsoft libxml2 up to 2.15.3 valid.c xmlSnprintfElements stack-based overflow

A vulnerability, which was classified as problematic, was found in xmlsoft libxml2 up to 2.15.3. Affected by this vulnerability is the function xmlSnprintfElements of the file valid.c. Such manipulation leads to stack-based buffer overflow.

This vulnerability is uniquely identified as CVE-2026-86140. Local access is required to approach this attack. No exploit exists.

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