CVE-2026-81889

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{"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, elFinder URL uploads in php/elFinder.class.php can bypass server-side request forgery protections when PHP cURL is unavailable because validate_address() validates $info['ip'], but get_remote_contents() selects fsock_get_contents(), which connects to $arr['host'] and performs a second DNS resolution. An attacker able to submit a URL upload can use DNS rebinding to have the first resolution return a public address and the connection resolution return a loopback or private address, causing the internal HTTP response body to be stored as an uploaded file and made readable through elFinder. After a successful fetch, get_headers($url, true) separately requests the original hostname without reusing the validated and pinned connection, creating an additional blind server-side request forgery path even when curl_get_contents() is selected. This issue is fixed in version 2.1.70."}], "id": "CVE-2026-81889", "lastModified": "2026-09-09T21:09:13.080", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-81889", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-03T18:04:00.867870Z", "version": "2.0.3"}}]}, "published": "2026-08-31T21:17:52.460", "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/6d997386cd0f1abab4706c220b46b0aea0ecff51"}, {"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-8x3q-jpjh-qh5c"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/Studio-42/elFinder/security/advisories/GHSA-8x3q-jpjh-qh5c"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.1.70)"}}], "enrichment": {"confidence": 97.0, "confidence_source": "matching", "scores": [{"score": 97.0, "source": "matching"}]}, "original": {"product": "elFinder", "source": "cna", "vendor": "Studio-42"}, "product": "elfinder", "vendor": "studio42"}], "created": "2026-08-31T21:45:04.640364+00:00", "updated": "2026-09-01T12:30:04.183590+00:00", "vendors": ["studio42", "studio42$PRODUCT$elfinder"]}