CVE-2026-45186 - Vulnerability Details - OpenCVE

In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Libexpat Project	Libexpat

No data.

No data.

References

Link	Providers
http://www.openwall.com/lists/oss-security/2026/05/11/16
https://github.com/libexpat/libexpat/pull/1216

History

Mon, 11 May 2026 23:30:00 +0000

Type	Values Removed	Values Added
References		http://www.openwall.com/lists/oss-security/2026/05/11/16

Mon, 11 May 2026 15:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sun, 10 May 2026 07:45:00 +0000

Type	Values Removed	Values Added
Title		Denial of Service via Attribute Name Collision in libexpat

Sun, 10 May 2026 06:45:00 +0000

Type	Values Removed	Values Added
Description		In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
First Time appeared		Libexpat Project Libexpat Project libexpat
Weaknesses		CWE-407
CPEs		cpe:2.3:a:libexpat_project:libexpat::::::::
Vendors & Products		Libexpat Project Libexpat Project libexpat
References		https://github.com/libexpat/libexpat/pull/1216
Metrics		cvssV3_1 `{'score': 2.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-05-10T06:36:16.927Z

Updated: 2026-05-11T22:23:27.385Z

Reserved: 2026-05-10T06:36:15.697Z

Link: CVE-2026-45186

Vulnrichment

Updated: 2026-05-11T22:23:27.385Z

NVD

Status : Awaiting Analysis

Published: 2026-05-10T07:16:07.883

Modified: 2026-05-13T15:42:30.497

Link: CVE-2026-45186

Redhat

No data.

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