NULL pointer dereference in expat - CVE-2026-24515
Published: February 3, 2026
Vulnerability identifier: #VU122267
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-2026-24515
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 perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in XML_ExternalEntityParserCreate. A remote attacker can pass specially crafted XML data to the application and perform a denial of service (DoS) attack.
How to mitigate CVE-2026-24515
Install updates from vendor's website.