{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-81891","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-27T17:48:42.123Z","datePublished":"2026-08-31T20:33:22.283Z","dateUpdated":"2026-09-01T14:58:22.211Z"},"containers":{"cna":{"title":"elFinder: ZIP extraction bypasses uploadDeny MIME filter allowing PHP file upload (RCE)","problemTypes":[{"descriptions":[{"cweId":"CWE-434","lang":"en","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq"},{"name":"https://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ff","tags":["x_refsource_MISC"],"url":"https://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ff"},{"name":"https://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365","tags":["x_refsource_MISC"],"url":"https://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365"},{"name":"https://github.com/Studio-42/elFinder/releases/tag/2.1.70","tags":["x_refsource_MISC"],"url":"https://github.com/Studio-42/elFinder/releases/tag/2.1.70"}],"affected":[{"vendor":"Studio-42","product":"elFinder","versions":[{"version":"< 2.1.70","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-31T20:33:22.283Z"},"descriptions":[{"lang":"en","value":"elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, checkExtractItems() in php/elFinderVolumeDriver.class.php calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize(). Because the .phtml, .phar, .php5, and .php3 extensions are absent from mime.types, the staticMimeMap entries that map them to text/x-php are not applied, and allowPutMime() permits extraction even when uploadDeny blocks text/x-php. An attacker with ZIP upload permission can extract PHP-executable files into a web-accessible files/ directory and achieve remote code execution when the server executes those extensions. This issue is fixed in version 2.1.70."}],"source":{"advisory":"GHSA-gxmj-r5rf-ggwq","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-01T14:16:58.011463Z","id":"CVE-2026-81891","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-01T14:58:22.211Z"}}]}}