CVE-2026-79781rclone serve s3 Path Traversal via dot-dot object keys

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-8v25-v8p6-qf7v) vendor-advisory
• VulnCheck Advisory: rclone serve s3 Path Traversal via dot-dot object keys third-party-advisory