CVE-2026-0992
Libxml2: libxml2: denial of service via crafted xml catalogs
- State
- Published
- Severity
- 2.9 Low
- Published
- Jan 15, 2026
- Updated
- Sep 1, 2026
- Reserved
- Jan 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 2.9 Low | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L | redhat |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
Red Hat Hardened ImagesRed Hat |
|
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat JBoss Core ServicesRed Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
- RHSA-2026:7519vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-0992vdb-entry
- RHBZ#2429975issue-tracking
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/1019
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