CVE-2026-45186

LOW

libexpat < 2.8.1 - Denial of Service via Attribute Name Collision Checks

Title source: llm
STIX 2.1

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.

References (12)

Core 12
Core References

Scores

CVSS v3 2.9
EPSS 0.0044
EPSS Percentile 36.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-407
Status published
Products (2)
libexpat project/libexpat < 2.8.1
libexpat_project/libexpat < 2.8.1
Published May 10, 2026
Tracked Since May 10, 2026