NULL Pointer Dereference in expat - CVE-2026-32776
Published: March 24, 2026
Vulnerability identifier: #VU124274
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-2026-32776
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: libexpat.org
Affected software:
expat
expat
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the XML parser when processing malicious XML content with empty external parameter entity content. A remote attacker can send a specially crafted XML file to cause a denial of service.
How to mitigate CVE-2026-32776
Install security update from vendor's repository.