cve-2026-45186

LOW CVSS 2.9 nvd
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.

Timeline
Published
2026-05-10
Last Modified
2026-09-16
CVSS Details
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
Affected Products
  • libexpat_project libexpat
Weaknesses (CWE)
CWE-407
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 2.9 LOW CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L 1.4 1.4 cve@mitre.org
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 3.9 3.6 nvd@nist.gov
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 3.9 3.6 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
CPE configurations
OR
CPE Version range Vulnerable
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* < 2.8.1 yes
NVD metadata
NVD status
Modified
Source identifier
cve@mitre.org
References
Linked Vulnerabilities
alas2-2026-3315 amazon_linux
alas2023-2026-1725 amazon_linux
alas2firefox-2026-060 amazon_linux
elsa-2026-22715 oracle_linux
elsa-2026-22721 oracle_linux
elsa-2026-23230 oracle_linux
openbsd-7.8-050 openbsd
openbsd-7.9-014 openbsd
bacc1417-4d82-11f1-87f3-18dbf25a98c6 freebsd
azurelinux3-86340 azure_linux 

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  "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.",
  "id": "CVE-2026-45186",
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  "source": "nvd",
  "title": "In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service ..."
}
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