{"id":"CVE-2026-54090","state":"PUBLISHED","title":"File Browser: Command Allowlist Bypass via Shell Metacharacter Injection","description":"File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.33.8, when a shell interpreter is configured (e.g. /bin/sh -c), the command allowlist can be bypassed through shell metacharacters. The allowlist validates only the first token of user input, but the entire raw string is handed to the shell — semicolons, pipes, backticks, and $() all work to chain arbitrary commands after a permitted one. This vulnerability is fixed in 2.33.8.","publishedAt":"2026-06-25T17:51:17.656Z","updatedAt":"2026-06-26T15:32:50.909Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["filebrowser filebrowser"],"affected":[{"vendor":"filebrowser","product":"filebrowser","versions":[{"version":"< 2.33.8","status":"affected"}]}],"references":["https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq","https://github.com/filebrowser/filebrowser/issues/5199"],"weaknesses":["CWE-77","CWE-184"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54090.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54090","state":"PUBLISHED","datePublished":"2026-06-25T17:51:17.656Z","dateUpdated":"2026-06-26T15:32:50.909Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-11T18:44:47.761Z"},"containers":{"cna":{"title":"File Browser: Command Allowlist Bypass via Shell Metacharacter Injection","descriptions":[{"lang":"en","value":"File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.33.8, when a shell interpreter is configured (e.g. /bin/sh -c), the command allowlist can be bypassed through shell metacharacters. The allowlist validates only the first token of user input, but the entire raw string is handed to the shell — semicolons, pipes, backticks, and $() all work to chain arbitrary commands after a permitted one. This vulnerability is fixed in 2.33.8."}],"affected":[{"vendor":"filebrowser","product":"filebrowser","versions":[{"version":"< 2.33.8","status":"affected"}]}],"references":[{"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq","name":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/filebrowser/filebrowser/issues/5199","name":"https://github.com/filebrowser/filebrowser/issues/5199","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-77","lang":"en","description":"CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-184","lang":"en","description":"CWE-184: Incomplete List of Disallowed Inputs","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-25T17:51:17.656Z"},"source":{"advisory":"GHSA-8c9q-7855-wfxq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-26T15:28:16.070106Z","id":"CVE-2026-54090","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-26T15:32:50.909Z"}}]}}}