Auth bypass in Rclone
CVE-2026-59733
Rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.74.4, rclone serve restic --private-repos enforces authorization using the routed user path segment while building the backend object key from the raw uncleaned URL path, allowing an authenticated user to include .. in a request such as //..//config and read, overwrite, or delete another user's private repository on backends that clean path components. This issue is fixed in version 1.74.4.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Rclone — versions < 1.74.4
Weakness classification (CWE)
References
- github.com/rclone/rclone/security/advisories/GHSA-fqj9-69pf-6pjg (Exploit, Mitigation, Vendor Advisory)
- github.com/rclone/rclone/commit/015fd0eba1cb138eef081517795fed47a2873f2d (Patch)
- github.com/rclone/rclone/commit/dade21c1616035b044df0eef7ee6a85aeb06a139 (Patch)
- github.com/rclone/rclone/releases/tag/v1.74.4 (Release Notes)
Frequently asked questions
- What is CVE-2026-59733?
- CVE-2026-59733 is a high-severity vulnerability in Rclone, classified under Path Traversal. CVSS score: 8.8/10. Published 2026-07-14.
- How severe is CVE-2026-59733?
- High severity. CVSS v3 base score is 8.8 out of 10.