CVE-2026-45186 PUBLISHED

Assigner: mitre
Reserved: 10.05.2026 Published: 10.05.2026 Updated: 10.05.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS Score: 2.9

Attack Vector	Local	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	libexpat project
Product	libexpat
Versions	Default: unaffected affected from 0 to 2.8.1 (excl.)

References

https://github.com/libexpat/libexpat/pull/1216

Problem Types

CWE-407 Inefficient Algorithmic Complexity CWE