CVE-2026-0990
Last modified
CVE-2026-0990 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 0.73% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Hardened Images | All versions |
| Redhat | Jboss Core Services | All versions |
| Redhat | Openshift Container Platform | 4.0 |
| Redhat | Enterprise Linux | 6.0 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Redhat | Enterprise Linux | 10.0 |
| Ibm | Vios | >= 4.1.0, < 4.1.1.30 |
| Ibm | Vios | 4.1.2.0 |
| Ibm | Aix | >= 7.2.5, < 7.2.5.12 |
| Ibm | Aix | >= 7.3.2, < 7.3.3.3 |
| Ibm | Aix | 7.3.4 |
| Xmlsoft | Libxml2 | < 2.15.2 |
References
- https://access.redhat.com/errata/RHSA-2026:7519Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-0990Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2429959Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018Exploit, Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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