Rclone is a command-line program to sync files and directories to and from different cloud storage providers. (CVE-2026-59733)
Description
Rclone versions prior to 1.74.4 contain an authorization bypass vulnerability in the 'serve restic --private-repos' command. This flaw allows an authenticated user to use directory traversal sequences ('..') in the URL path to access, modify, or delete other users' private repositories. The vulnerability is due to improper sanitization of the URL path when building the backend object key, while authorization checks are performed on a routed user path segment. This issue is fixed in version 1.74.4.
CVSS v3.1
Score 8.8high
Affected software
pkg:deb/ubuntu/rclone?arch=source&distro=bionicpkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/rclone?arch=source&distro=stonkingpkg:deb/ubuntu/rclone?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59733 affects rclone versions before 1.74.4 and involves an authorization bypass in the 'serve restic --private-repos' command. The vulnerability arises because the backend object key is constructed from the raw, unsanitized URL path, allowing an authenticated user to use '..' sequences to traverse directories and access or manipulate other users' private repositories. Authorization enforcement occurs on a routed user path segment, which does not account for the raw path manipulation, leading to the bypass. The issue is resolved in rclone version 1.74.4.
Potential Impact
An authenticated user can bypass authorization controls to access, modify, or delete private repositories belonging to other users. This can lead to unauthorized data exposure, data tampering, or data loss within the affected rclone service.
Mitigation Recommendations
Upgrade rclone to version 1.74.4 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-rclone-2026-59733
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-59733"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- High
Patch Information
Threat ID: 6aa005c7acd9273b49ab5c70
Added to database: 09/08/2026, 12:55:35 UTC
Last enriched: 10/18/2026, 04:37:46 UTC
Last updated: 10/22/2026, 01:15:24 UTC
Views: 52
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