{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72836", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-10T15:13:41.486Z", "datePublished": "2026-08-14T11:35:41.491Z", "dateUpdated": "2026-08-14T16:52:17.496Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-14T16:52:17.496Z"}, "datePublic": "2026-07-25T00:00:00.000Z", "title": "FileBrowser before 2.63.19 Case Sensitivity Authentication Bypass", "descriptions": [{"lang": "en", "value": "FileBrowser before 2.63.19 does not account for case-insensitive filesystems when checking home directory ownership during self-registration. When Signup and CreateUserDir are enabled and FileBrowser's root is on a case-insensitive filesystem (confirmed on Windows/NTFS), two self-registered usernames that differ only in letter case (e.g., CaseVictim and casevictim) are stored as distinct accounts but resolve to the same physical home directory, because the scope-ownership check compares the persisted scope as an exact case-sensitive string. A second registrant can therefore read, overwrite, and delete another account's files through authenticated HTTP endpoints, without needing an existing account or victim interaction."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Handling of Case Sensitivity", "cweId": "CWE-178", "type": "CWE"}]}], "affected": [{"vendor": "filebrowser", "product": "filebrowser", "defaultStatus": "unaffected", "packageURL": "pkg:golang/github.com/filebrowser/filebrowser/v2", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "2.63.19"}, {"version": "2.63.19", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.63.19"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 9.2, "baseSeverity": "CRITICAL"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-576v-w77m-gr84", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-576v-w77m-gr84)"}, {"url": "https://github.com/filebrowser/filebrowser/commit/fe7efb2e6afe66774cd86a5b0a03033bd514d0c0", "tags": ["patch"], "name": "Patch Commit"}, {"name": "VulnCheck Advisory: FileBrowser before 2.63.19 Case Sensitivity Authentication Bypass", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/filebrowser-before-case-sensitivity-authentication-bypass"}], "credits": [{"lang": "en", "value": "luoy16002-svg", "type": "reporter"}, {"lang": "en", "value": "hacdias", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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{}

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