CVE-2026-72834
filebrowser before 2.63.19 Permission Bypass via checksum
- State
- Published
- Severity
- 5.3 Medium
- Published
- Aug 14, 2026
- Updated
- Aug 14, 2026
- Reserved
- Aug 10, 2026
Description
filebrowser before 2.63.19 contains a permission bypass in the /api/resources endpoint. The checksum (?checksum=) branch of resourceGetHandler reads the entire file to compute a digest and returns it without performing a Perm.Download check (unlike the sibling raw, preview, and subtitle paths). As a result, an authenticated user provisioned with Perm.Download=false can obtain a content-hash oracle for any same-scope file (md5/sha1/sha256/sha512), enabling confirmation of known/guessed content, change detection, and offline brute-force of low-entropy files. This is an incomplete fix of CVE-2026-35606; it bypasses only the Download permission and does not defeat scope/path authorization.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
filebrowserfilebrowser |
|
References
- GitHub Security Advisory (GHSA-7whw-q6gh-xr59)vendor-advisory
- Patch Commitpatch
- VulnCheck Advisory: filebrowser before 2.63.19 Permission Bypass via checksumthird-party-advisory
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