CVE-2026-79781
rclone serve s3 Path Traversal via dot-dot object keys
- State
- Published
- Severity
- 6.9 Medium
- Published
- Aug 25, 2026
- Updated
- Aug 25, 2026
- Reserved
- Aug 25, 2026
Description
rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in the serve root directory.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
rclonerclone |
|
References
- GitHub Security Advisory (GHSA-8v25-v8p6-qf7v)vendor-advisory
- VulnCheck Advisory: rclone serve s3 Path Traversal via dot-dot object keysthird-party-advisory
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