Integer Overflow or Wraparound Affecting libexpat package, versions [,2.8.2)
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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- published22 Jun 2026
- disclosed21 Jun 2026
- creditUnknown
Introduced: 21 Jun 2026
CVE-2026-56406 (opens in a new tab)How to fix?
Upgrade libexpat to version 2.8.2 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound due to improper validation in the XML_ParseBuffer function. An attacker can cause unexpected behavior, including potential data corruption or application crashes, by providing specially crafted input that triggers an integer overflow.