Out-of-bounds Read Affecting expat package, versions [,2.8.3)
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-21707489
- published25 Oct 2026
- disclosed10 Aug 2026
- creditUnknown
Introduced: 10 Aug 2026
CVE-2026-72522 (opens in a new tab)How to fix?
Upgrade expat to version 2.8.3 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read in the Unicode processing *_toUtf16 functions. An attacker can cause an infinite loop and denial of service by providing specially crafted Unicode input that causes low surrogates to be treated the same as high surrogates.