{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54090","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-11T18:44:47.761Z","datePublished":"2026-06-25T17:51:17.656Z","dateUpdated":"2026-06-25T17:51:17.656Z"},"containers":{"cna":{"title":"File Browser: Command Allowlist Bypass via Shell Metacharacter Injection","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"}]}],"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"}}],"references":[{"name":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq"},{"name":"https://github.com/filebrowser/filebrowser/issues/5199","tags":["x_refsource_MISC"],"url":"https://github.com/filebrowser/filebrowser/issues/5199"}],"affected":[{"vendor":"filebrowser","product":"filebrowser","versions":[{"version":"< 2.33.8","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-25T17:51:17.656Z"},"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."}],"source":{"advisory":"GHSA-8c9q-7855-wfxq","discovery":"UNKNOWN"}}}}