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LOW · 2.9

CVE-2026-45186

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.

Vulnerability 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.

CVSS Score

2.9

LOW

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 Products

VendorProductVersions
Libexpat ProjectLibexpat< 2.8.1

Related Weaknesses (CWE)

CWE-407

References

FAQ

What is CVE-2026-45186?

CVE-2026-45186 is a vulnerability with a CVSS score of 2.9 (LOW). 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.

How severe is CVE-2026-45186?

CVE-2026-45186 has been rated LOW with a CVSS base score of 2.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-45186?

Check the references section above for vendor advisories and patch information. Affected products include: Libexpat Project Libexpat.