CVE-2026-79781: Rclone

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Rclone Rclone: before 1.74.4 (fixed in 1.74.4)

Published 2026-08-25. Last modified 2026-09-10.