{"id":"CVE-2026-54093","aliases":["GHSA-gxjx-7m74-hcq8","GO-2026-5411"],"url":"https://o3.security/vulnerability/CVE-2026-54093","summary":"File Browser: Path traversal in download-as-zip/tar via Windows-style backslash separators in stored filenames","details":"File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, filebrowser builds the download-as-zip / download-as-tar archive entry names with filepath.ToSlash, which on a Linux host is a no-op for backslashes (\\ is only a path separator on Windows). A file whose name contains Windows-style traversal is accepted by the resource handlers, stored on the Linux filesystem with a literal backslash name, and then emitted verbatim as the archive entry name. Windows extractors interpret \\ as a path separator and write the extracted file outside the extraction directory — arbitrary file write on the victim who downloads and extracts the archive. This vulnerability is fixed in 2.63.6.","published":"2026-06-25T17:39:06.613Z","modified":"2026-08-12T03:51:41.782039587Z","cvss":null,"epss":{"score":0.00193,"percentile":0.09038,"asOf":"2026-09-01"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/filebrowser/filebrowser/v2","fixedVersion":"2.63.6"},{"ecosystem":"Go","name":"github.com/filebrowser/filebrowser","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54093.json"},{"type":"ADVISORY","url":"https://github.com/filebrowser/filebrowser/security/advisories/GHSA-gxjx-7m74-hcq8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54093"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:41.782039587Z"}}