{"id":"CVE-2026-73569","title":"fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks","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 pa…","severity":"high","cwe":["CWE-776"],"published":"2026-08-13","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:09:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73569","references":[{"url":"https://github.com/NaturalIntelligence/fast-xml-parser/commit/4e546e03987662de5495d050b5fba26bea65383f","label":"security-advisories@github.com"},{"url":"https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.10.1","label":"security-advisories@github.com"},{"url":"https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-8r6m-32jq-jx6q","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73569.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-73569"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515526"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-73569"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73569"},{"url":"https://access.redhat.com/errata/RHSA-2026:66003"},{"url":"https://access.redhat.com/errata/RHSA-2026:67724"},{"url":"https://access.redhat.com/errata/RHSA-2026:65130"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00372,"epssPercentile":0.30931,"ingestedAt":"2026-09-18T20:51:25.607Z","vendor":"Red Hat","product":"Red Hat Openshift Data Foundation 4.22","affected":["openshift_gitops","ansible_automation_platform 2.2","migration_toolkit_for_applications 8.2","openshift_data_foundation 4.22"],"patched":["ansible_automation_platform 2.2","migration_toolkit_for_applications 8.2","openshift_data_foundation 4.22"],"cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","slug":"CVE-2026-73569","body":"## Overview\n\nfast-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:66003** · Red Hat · fixed in: Red Hat Ansible Automation Platform 2.2 · released 2026-09-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:66003)\n- **RHSA-2026:67724** · Red Hat · fixed in: Red Hat Migration Toolkit for Applications 8.2 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67724)\n- **RHSA-2026:65130** · Red Hat · fixed in: Red Hat Openshift Data Foundation 4.22 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65130)\n- **Red Hat VEX** · Important · affected: Red Hat OpenShift GitOps · no fix planned: Red Hat OpenShift GitOps · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-73569.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":208474,"id":"CVE-2026-73569","ts":1790005711494,"field":"cvss","old":null,"new":"7.5"},{"seq":208473,"id":"CVE-2026-73569","ts":1790005711494,"field":"severity","old":"none","new":"high"}]}