CVE-2026-50219

4.9 MEDIUM

Published: June 04, 2026 Modified: June 04, 2026

Description

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,

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/libexpat/libexpat/pull/1246

Source: cve@mitre.org

Issue Tracking Patch

1 reference(s) from NVD

Quick Stats

CVSS v3 Score

4.9 / 10.0

EPSS (Exploit Probability)

0.1%

1th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-416

Affected Vendors

libexpat_project

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