Out-of-bounds Write Affecting libxml2 package, versions [,2.15.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-LIBXML2-20079009
- published24 Sept 2026
- disclosed5 Sept 2026
- creditUnknown
Introduced: 5 Sep 2026
NewCVE-2026-86138 (opens in a new tab)How to fix?
Upgrade libxml2 to version 2.15.4 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write in the xmlDictAddQString function in dict.c due to an integer overflow that leads to a heap-based buffer overflow. An attacker can execute arbitrary code by supplying specially crafted input that triggers the overflow during processing.