{"apiVersion":"1.0","identifier":"CVE-2026-73569","description":"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.","publishedAt":"2026-08-13T18:18:19","lastModifiedAt":"2026-08-13T19:17:36","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73569","cvssScore":8.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","epssProbability":0.00372,"riskScore":0.9,"affectedProduct":"fast-xml-parser","affectedVersions":">=5.9.3,<=5.10.1","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73569","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73569","en":"https://www.redsauce.net/en/cves/CVE-2026-73569","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73569","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73569","de":"https://www.redsauce.net/de/cves/CVE-2026-73569","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73569","el":"https://www.redsauce.net/el/cves/CVE-2026-73569"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73569"}}