CVE-2026-0990

Libxml2: libxml2: denial of service via uncontrolled recursion in xml catalog processing

publishedCWE-674

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.

Technical severity5.9 mediumCVSS 3.1 · CNA: redhat

Published2026-01-15Source updated 2026-11-06

Collected2026-11-063 attributed sources

Fixes and workarounds

Workaround

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Hardened Images Red Hat `libxml2-main` https://catalog.redhat.com/software/containers/	≥ 2.15.2-0.3.hum1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10 Red Hat `libxml2` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `libxml2` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 7 Red Hat `libxml2` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `libxml2` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `libxml2` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat JBoss Core Services Red Hat `libxml2` https://access.redhat.com/jbossnetwork/restricted/listSoftware.html	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-ai-gateway-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-core-bff-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-dashboard-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-dashboard-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-data-science-pipelines-operator-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-kf-notebook-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-kserve-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-kserve-llmisvc-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-kserve-module-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-kuberay-operator-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-kube-rbac-proxy-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-llama-stack-k8s-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-maas-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mlflow-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mlflow-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-agent-ops-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-automl-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-autorag-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-eval-hub-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-gen-ai-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-maas-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-mlflow-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-mod-arch-model-registry-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-model-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-model-registry-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-model-serving-api-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-notebook-controller-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-ogx-k8s-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-ogx-module-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-training-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-trustyai-service-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift AI (RHOAI) Red Hat `rhoai/odh-workbenches-operator-rhel9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift/ose-rhel-coreos-8` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift/ose-rhel-coreos-9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (3)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
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            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  },
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "4.1.1.30",
            "versionStartIncluding": "4.1.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:ibm:vios:4.1.2.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "7.2.5.12",
            "versionStartIncluding": "7.2.5",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "7.3.3.3",
            "versionStartIncluding": "7.3.2",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:ibm:aix:7.3.4:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  },
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "2.15.2",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 5.9 medium	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`	CNA: redhat
3.1 / 5.9 medium	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`	NVD: [email protected]

Exploit evidence

https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018
exploit · [email protected]

References

https://access.redhat.com/errata/RHSA-2026:7519CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-0990CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2429959CNA: redhat · issue-tracking, x_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018CNA: redhat
https://access.redhat.com/errata/RHSA-2026:7519[email protected] · Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-0990[email protected] · Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2429959[email protected] · Issue Tracking, Third Party Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018[email protected] · Exploit, Issue Tracking, Third Party Advisory

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