Use After Free Affecting expat package, versions <2.8.2-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.18% (7th percentile)

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  • Snyk IDSNYK-WOLFILATEST-EXPAT-17495916
  • published25 Jun 2026
  • disclosed4 Jun 2026

Introduced: 4 Jun 2026

CVE-2026-50219  (opens in a new tab)
CWE-416  (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.

libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,

CVSS Base Scores

version 3.1