{"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"}}]}}

{}

{"affected": [{"affectedData": [{"product": "elFinder", "vendor": "Studio-42", "versions": [{"status": "affected", "version": "< 2.1.70"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-81891", "lastModified": "2026-09-01T15:17:31.237", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-81891", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-01T14:16:58.011463Z", "version": "2.0.3"}}]}, "published": "2026-08-31T21:17:52.757", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ff"}, {"source": "security-advisories@github.com", "url": "https://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365"}, {"source": "security-advisories@github.com", "url": "https://github.com/Studio-42/elFinder/releases/tag/2.1.70"}, {"source": "security-advisories@github.com", "url": "https://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-434"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}