Incorrect Synchronization Affecting expat package, versions <2.8.2-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.1% (1st percentile)

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  • Snyk IDSNYK-WOLFILATEST-EXPAT-17495915
  • published25 Jun 2026
  • disclosed19 Jun 2026

Introduced: 19 Jun 2026

CVE-2026-56132  (opens in a new tab)
CWE-821  (opens in a new tab)

How to fix?

Upgrade Wolfi expat to version 2.8.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

CVSS Base Scores

version 3.1