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Vulnerabilities CVE-2026-0992

CVE-2026-0992

Low
Open
TLP:CLEAR

Libxml2: libxml2: denial of service via crafted xml catalogs

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Description

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.

Details

CVSS Score
2.9
CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Confidence
90%
Published
Jan 15, 2026
Last Modified
Aug 21, 2026
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