{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-25896", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-06T21:08:39.130Z", "datePublished": "2026-02-20T20:57:48.074Z", "dateUpdated": "2026-09-02T12:04:30.648Z" }, "containers": { "cna": { "title": "fast-xml-parser has an entity encoding bypass via regex injection in DOCTYPE entity names", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-185", "lang": "en", "description": "CWE-185: Incorrect Regular Expression", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N", "version": "3.1" } } ], "references": [ { "name": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-m7jm-9gc2-mpf2", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-m7jm-9gc2-mpf2" }, { "name": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/943ef0eb1b2d3284e72dd74f44a042ee9f07026e", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/943ef0eb1b2d3284e72dd74f44a042ee9f07026e" }, { "name": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/ddcd0acf26ddd682cb0dc15a2bd6aa3b96bb1e69", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/ddcd0acf26ddd682cb0dc15a2bd6aa3b96bb1e69" }, { "name": "https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.3.5", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.3.5" } ], "affected": [ { "vendor": "NaturalIntelligence", "product": "fast-xml-parser", "versions": [ { "version": ">= 5.0.0, < 5.3.5", "status": "affected" }, { "version": ">= 4.1.3, < 4.5.4", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-02T19:11:31.673Z" }, "descriptions": [ { "lang": "en", "value": "fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. From 4.1.3to before 5.3.5, a dot (.) in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow built-in XML entities (<, >, &, ", ') with arbitrary values. This bypasses entity encoding and leads to XSS when parsed output is rendered. This vulnerability is fixed in 5.3.5." } ], "source": { "advisory": "GHSA-m7jm-9gc2-mpf2", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-02-23T19:26:46.154155Z", "id": "CVE-2026-25896", "options": [ { "Exploitation": "poc" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-23T19:29:10.187Z" } }, { "affected": [ { "collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": [ "cpe:/a:redhat:advanced_cluster_security:4.8::el8" ], "defaultStatus": "affected", "packageName": "advanced-cluster-security/rhacs-main-rhel8", "product": "Red Hat Advanced Cluster Security 4.8", "vendor": "Red Hat", "versions": [ { "lessThan": "*", "status": "unaffected", "version": "1775594119", "versionType": 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