xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
History

Tue, 23 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
Title Integer Overflow in XML Notation Declaration Parsing expat: libexpat: Integer Overflow Vulnerability Leading to Information Disclosure or Code Execution
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 17:45:00 +0000

Type Values Removed Values Added
Title Integer Overflow in XML Notation Declaration Parsing

Sun, 21 Jun 2026 16:45:00 +0000

Type Values Removed Values Added
Description xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-06-21T15:56:42.729Z

Updated: 2026-06-22T16:31:30.518Z

Reserved: 2026-06-21T15:56:42.365Z

Link: CVE-2026-56411

cve-icon Vulnrichment

Updated: 2026-06-22T16:31:27.615Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-21T15:56:42Z

Links: CVE-2026-56411 - Bugzilla