{"id":"CVE-2026-72839","state":"PUBLISHED","title":"filebrowser through 2.63.16 Privilege Escalation via Signup","description":"filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions, allowing unrestricted access to all files.","publishedAt":"2026-08-13T21:54:39.242Z","updatedAt":"2026-08-14T16:52:19.479Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["filebrowser filebrowser"],"affected":[{"vendor":"filebrowser","product":"filebrowser","packageURL":"pkg:golang/github.com/filebrowser/filebrowser/v2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.63.16","versionType":"semver"}]}],"references":["https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6","https://www.vulncheck.com/advisories/filebrowser-through-privilege-escalation-via-signup"],"weaknesses":["CWE-266"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72839.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72839","state":"PUBLISHED","datePublished":"2026-08-13T21:54:39.242Z","dateUpdated":"2026-08-14T16:52:19.479Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-10T15:13:41.486Z"},"containers":{"cna":{"title":"filebrowser through 2.63.16 Privilege Escalation via Signup","descriptions":[{"lang":"en","value":"filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions, allowing unrestricted access to all files."}],"affected":[{"vendor":"filebrowser","product":"filebrowser","packageURL":"pkg:golang/github.com/filebrowser/filebrowser/v2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.63.16","versionType":"semver"}]}],"references":[{"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-6759-996p-gpj6)"},{"url":"https://www.vulncheck.com/advisories/filebrowser-through-privilege-escalation-via-signup","name":"VulnCheck Advisory: filebrowser through 2.63.16 Privilege Escalation via Signup","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-266","lang":"en","description":"Incorrect Privilege Assignment","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-14T16:52:19.479Z"},"datePublic":"2026-07-25T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*","versionEndIncluding":"2.63.16"}]}]}],"credits":[{"lang":"en","value":"je-lv","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-14T16:14:53.807243Z","id":"CVE-2026-72839","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-14T16:15:23.878Z"}}]}}}