High [CVE-2026-73569] Denial of Service via repeated DOCTYPE declarations
This high-severity Red Hat Linux advisory covers CVE-2026-73569 affecting Red Hat Ansible Automation Platform 2.2, Red Hat Openshift Data Foundation 4.22, Migration Toolkit for Applications 8.
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Summary
fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks.
From 5.9.3 until 5.10.1, src/xmlparser/OrderedObjParser.js processes multiple DOCTYPE declarations within a single XML document and passes each declaration's entities through addInputEntities(). addInputEntities() resets maxTotalExpansions and maxExpandedLength every time it is called, allowing additional DOCTYPE declarations to repeatedly reset the configured entity-expansion limits during one parse operation.
A crafted XML document can then cause excessive CPU use, event-loop blocking, memory exhaustion, and process termination. This issue is fixed in version 5.10.1.
A remote attacker could exploit this by submitting a specially crafted XML document containing multiple DOCTYPE declarations. This is an Important denial of service vulnerability affecting Red Hat products that process untrusted XML input using the `fast-xml-parser` library versions 5.9.3 through 5.10.0.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-776.
Affected Red Hat products: Red Hat Ansible Automation Platform 2.2; Red Hat Openshift Data Foundation 4.22; Migration Toolkit for Applications 8; Red Hat OpenShift GitOps.
- 5.9.3
Official advisory · high-confidence parse· fetched 27 days ago·verify at source
- 5.10.1
- ansible-automation-platform/bootc-automation-portal-rhel9:1788943531
- odf4/cephcsi-rhel9:1788162216
- odf4/cephcsi-rhel9-operator:1788161757
- odf4/devicefinder-rhel9:1788162237
- odf4/mcg-core-rhel9:1788162644
- odf4/mcg-rhel9-operator:1788162674
- odf4/ocs-client-console-rhel9:1788163152
- odf4/ocs-client-rhel9-operator:1788162698
- odf4/ocs-metrics-exporter-rhel9:1788163060
- odf4/ocs-rhel9-operator:1788163064
- odf4/odf-blackbox-exporter-rhel9:1788163005
- odf4/odf-cli-rhel9:1788163238
- odf4/odf-cloudnative-pg-rhel9-operator:1788163127
- odf4/odf-console-rhel9:1788164027
- odf4/odf-cosi-sidecar-rhel9:1788163231
- odf4/odf-csi-addons-rhel9-operator:1788165796
- odf4/odf-csi-addons-sidecar-rhel9:1788163305
- odf4/odf-drbd-rhel9:1788163607
- odf4/odf-external-snapshotter-rhel9-operator:1788163696
- odf4/odf-external-snapshotter-sidecar-rhel9:1788163691
- odf4/odf-lightspeed-rag-content-rhel9:1788163742
- odf4/odf-multicluster-console-rhel9:1788164126
- odf4/odf-multicluster-rhel9-operator:1788163839
- odf4/odf-must-gather-rhel9:1788164031
- odf4/odf-rhel9-operator:1788164121
- odf4/odr-rhel9-operator:1788164141
- odf4/odr-volsync-plugin-mover-rhel9:1788164576
- odf4/odr-volsync-plugin-rhel9-operator:1788164736
- odf4/rook-ceph-rhel9-operator:1788164857
- RHSA-2026:66003
- RHSA-2026:65130
Official advisory · high-confidence parse· fetched 27 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 27 days ago·verify at source
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