Description
libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.
Published: 2026-06-21
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 24 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
Title Integer Overflow in XML_ParseBuffer Causing Memory Corruption libexpat: libexpat: Arbitrary code execution via integer overflow in XML_ParseBuffer
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 22 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Sun, 21 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
Title Integer Overflow in XML_ParseBuffer Causing Memory Corruption

Sun, 21 Jun 2026 16:00:00 +0000

Type Values Removed Values Added
Description libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Parse.
First Time appeared Libexpat Project
Libexpat Project libexpat
Weaknesses CWE-190
CPEs cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Vendors & Products Libexpat Project
Libexpat Project libexpat
References
Metrics cvssV3_1

{'score': 6.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L'}


Subscriptions

Libexpat Project Libexpat
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-22T17:02:44.194Z

Reserved: 2026-06-21T15:48:21.578Z

Link: CVE-2026-56406

cve-icon Vulnrichment

Updated: 2026-06-22T17:02:40.816Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-21T15:48:21Z

Links: CVE-2026-56406 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-21T19:45:16Z

Weaknesses