rclone `serve restic --private-repos` authorization bypass: `..` in the URL path lets an authenticated user read, overwrite and delete other users' repositories
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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-59733US | — | — | ||
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 authoriz… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/rclone/rclone/commit/015fd0eba1cb138eef081517795fed47a2873f2dFIX
- https://github.com/rclone/rclone/commit/dade21c1616035b044df0eef7ee6a85aeb06a139FIX
- https://github.com/rclone/rclone/releases/tag/v1.74.4ARTICLE
- https://github.com/rclone/rclone/security/advisories/GHSA-fqj9-69pf-6pjgADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-59733WEB
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