CVSS 3.1
6.8 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:NCVE-2026-62843
Medium (6.8). EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/filebrowser/filebrowser/v2 2.63.17.
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. From 2.63.6 to 2.63.16, File Browser's archive builder uses strings.ReplaceAll(nameInArchive, "\", "/"), which turns a POSIX filename such as ..\..\evil.sh into the archive entry ../../evil.sh, allowing a user with upload permission to plant a backslash-named file that escapes the extraction directory when another user downloads and extracts the generated zip or tar archive. This issue is fixed in version 2.63.17.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-23
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-83xp-526h-j3ww | Go | github.com/filebrowser/filebrowser/v2 | >=2.63.6 <2.63.17 | 2.63.17 |
| GO-2026-6026 | Go | github.com/filebrowser/filebrowser | all versions | no fix published |
| GO-2026-6026 | Go | github.com/filebrowser/filebrowser/v2 | >=2.63.6 <2.63.17 | 2.63.17 |
References
- https://github.com/filebrowser/filebrowser/commit/8503ba61ff51d48a7313896483d130eb6a5abfe0
- https://github.com/filebrowser/filebrowser/releases/tag/v2.63.17
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-83xp-526h-j3ww
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-83xp-526h-j3ww