{"id":"CVE-2026-54090","aliases":["GHSA-8c9q-7855-wfxq","GO-2026-5250"],"url":"https://o3.security/vulnerability/CVE-2026-54090","summary":"File Browser: Command Allowlist Bypass via Shell Metacharacter Injection","details":"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.","published":"2026-06-25T17:51:17.656Z","modified":"2026-08-12T03:51:15.402389221Z","cvss":null,"epss":{"score":0.00323,"percentile":0.24961,"asOf":"2026-08-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/filebrowser/filebrowser/v2","fixedVersion":"2.33.8"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54090.json"},{"type":"ADVISORY","url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54090"},{"type":"REPORT","url":"https://github.com/filebrowser/filebrowser/issues/5199"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:15.402389221Z"}}