Infinite loop in expat - CVE-2026-32777

 

Infinite loop in expat - CVE-2026-32777

Published: March 24, 2026


Vulnerability identifier: #VU124277
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-32777
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: libexpat.org
Affected software:
expat

Detailed vulnerability description

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an infinite loop in the DTD content parser when processing a specially crafted XML file. A remote attacker can send a specially crafted request to cause a denial of service.


How to mitigate CVE-2026-32777

Install security update from vendor's repository.

Sources