Incorrect Synchronization Affecting expat package, versions [0,]
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-EXPAT-17398176
- published22 Jun 2026
- disclosed19 Jun 2026
- creditUnknown
Introduced: 19 Jun 2026
NewCVE-2026-56132 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Incorrect Synchronization in the doProlog function in xmlparse.c due to improper handling of scaffold backing array reallocation when data structures are shared across multiple parsers. An attacker can achieve arbitrary code execution or cause a denial of service by providing specially crafted XML input that triggers the buffer overflow.