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,
Published: 2026-06-04
Score: 4.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 08 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in libexpat XML Parser Due to Missing Call Depth Tracking expat: libexpat: Use-after-free vulnerability due to improper handler call depth tracking
Weaknesses CWE-911
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 04 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 04 Jun 2026 06:45:00 +0000

Type Values Removed Values Added
Title Use‑After‑Free in libexpat XML Parser Due to Missing Call Depth Tracking

Thu, 04 Jun 2026 05:30:00 +0000

Type Values Removed Values Added
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,
First Time appeared Libexpat Project
Libexpat Project libexpat
Weaknesses CWE-416
CPEs cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Vendors & Products Libexpat Project
Libexpat Project libexpat
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L'}


Subscriptions

Libexpat Project Libexpat
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-04T12:36:14.744Z

Reserved: 2026-06-04T04:20:31.953Z

Link: CVE-2026-50219

cve-icon Vulnrichment

Updated: 2026-06-04T12:36:11.037Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-04T06:16:25.050

Modified: 2026-06-04T18:39:29.530

Link: CVE-2026-50219

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-04T04:20:32Z

Links: CVE-2026-50219 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-08T14:30:06Z

Weaknesses