Integer Overflow or Wraparound 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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- published24 Sept 2026
- disclosed5 Sept 2026
- creditUnknown
Introduced: 5 Sep 2026
NewCVE-2026-86143 (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 Integer Overflow or Wraparound due to an integer overflow in the xmlIO process. An attacker can cause data corruption or compromise data integrity and confidentiality by triggering a condition where negative length values are passed to write callbacks, leading to unsafe states in downstream logic.