#VU124278 NULL pointer dereference in expat - CVE-2026-32778

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Main Vulnerability Database Vulnerabilities #VU124278

#VU124278 NULL pointer dereference in expat - CVE-2026-32778

Published: March 24, 2026


Vulnerability identifier: #VU124278
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-32778
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
expat
Software vendor:
libexpat.org

Description

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

The vulnerability exists due to a NULL pointer dereference in the function setContext in libexpat when processing XML input under low-memory conditions. A remote attacker can send a specially crafted XML file to cause a denial of service.

Exploitation requires repeated processing of malicious input following an initial out-of-memory condition.


Remediation

Install security update from vendor's repository.

External links