CVE-2026-45186

LOW 2.9

CVSS Score

2.9

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-407
Vendor	libexpat project
Product	libexpat
Published	May 10, 2026
Last Updated	Jul 15, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

libexpat project / libexpat

0 < 2.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗