In libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer overflow.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Xmlsoft
  • Libxml2

No data.

No data.

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Vendors Products
References
Link Providers
https://github.com/GNOME/libxml2/commit/8edbbdb09f24d26a2f900141fddc2b9d014f53b0 cve-icon cve-icon
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4 cve-icon cve-icon
History

Sat, 05 Sep 2026 06:15:00 +0000

Type Values Removed Values Added
Title Integer Overflow in libxml2 URI Escaping Function

Sat, 05 Sep 2026 04:45:00 +0000

Type Values Removed Values Added
Description In libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer overflow.
First Time appeared Xmlsoft
Xmlsoft libxml2
Weaknesses CWE-190
CPEs cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
Vendors & Products Xmlsoft
Xmlsoft libxml2
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:

Updated: 2026-09-05T04:23:14.686Z

Reserved: 2026-09-05T04:23:14.327Z

Link: CVE-2026-86139

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-05T05:17:12.730

Modified: 2026-09-05T05:17:12.730

Link: CVE-2026-86139

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-05T06:00:12Z