CVE-2026-0990
Medium
Description
A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker could exploit this configuration-dependent issue by providing a specially crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Xmlsoft Libxml2
PublishedJan 15, 2026
First seenJan 15, 2026
Weakness typeCWE-674CWE-674
How to fix
Update
- xmlsoft libxml22.15.2 or later
- ibm vios4.1.1.30 or later
- ibm aix7.2.5.12, 7.3.3.3 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| xmlsoft libxml2 | v < 2.15.2 | 2.15.2 |
| redhat hardened_images | No range specified | — |
| redhat jboss_core_services | No range specified | — |
| redhat openshift_container_platform | 4.0 | — |
| redhat enterprise_linux | 6.0, 7.0, 8.0, 9.0, 10.0 | — |
| ibm vios | 4.1.0 ≤ v < 4.1.1.30, 4.1.2.0 | 4.1.1.30 |
| ibm aix | 7.2.5 ≤ v < 7.2.5.12, 7.3.2 ≤ v < 7.3.3.3, 7.3.4 | 7.2.5.12, 7.3.3.3 |
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