Uncontrolled Recursion in Libxml2 - CVE-2026-0990
Published: January 27, 2026
Vulnerability identifier: #VU122088
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-0990
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Gnome Development Team
Affected software:
Libxml2
Libxml2
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an uncontrolled recursion in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker can pass specially crafted input to the application and perform a denial of service attack.
How to mitigate CVE-2026-0990
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.