Medium 5.9Published Jan 15, 2026

CVE-2026-0990Libxml2: libxml2: denial of service via uncontrolled recursion in xml catalog processing

Updated under an hour ago (Oct 26, 2026, 6:40 PM ET)

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It affects Red Hat Hardened Images and 8 other products. Add what you run to find out whether that includes you.

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Every CVE for Red Hat Hardened Images

Exploited in the last 30 days

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.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-674
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Analyzed
Record last updated: Sep 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Hardened Images redhat:hummingbird	from 2.15.2-0.3.hum1 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CNA record
Red Hat Red Hat JBoss Core Services redhat:jboss_core_services	1	CNA record
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CNA record
redhat hardened_images redhat:hardened_images	all versions	NVD
redhat jboss_core_services redhat:jboss_core_services	all versions	NVD
redhat openshift_container_platform redhat:openshift_container_platform	4.0	NVD
redhat enterprise_linux redhat:enterprise_linux	6.0; 7.0; 8.0; 9.0; 10.0	NVD
ibm vios ibm:vios	from 4.1.0 before 4.1.1.30; 4.1.2.0	NVD
ibm aix ibm:aix	from 7.2.5 before 7.2.5.12; from 7.3.2 before 7.3.3.3; 7.3.4	NVD
1–10 of 11

References

References

https://access.redhat.com/errata/RHSA-2026:7519	vendor-advisory, x-refsource-redhat, third-party-advisory
https://access.redhat.com/security/cve/CVE-2026-0990	vdb-entry, x-refsource-redhat, third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2429959	issue-tracking, x-refsource-redhat, third-party-advisory
https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018	exploit, issue-tracking, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.