Path Traversal in Rclone
CVE-2026-79781
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.
Vulnerability class: Path Traversal (Directory Traversal)
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-79781?
- CVE-2026-79781 is a medium-severity vulnerability in Rclone, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-08-25.
- How severe is CVE-2026-79781?
- Medium severity. CVSS v3 base score is 6.5 out of 10.