CVE-2026-41179
Starting in version 1.48.0 and prior to version 1.73.5, the RC endpoint `operations/fsinfo` is exposed without `AuthRequired: true` and accepts attacker-controlled `fs` input.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Rclone is a command-line program to sync files and directories to and from different cloud storage providers. Starting in version 1.48.0 and prior to version 1.73.5, the RC endpoint `operations/fsinfo` is exposed without `AuthRequired: true` and accepts attacker-controlled `fs` input. Because `rc.GetFs(...)` supports inline backend definitions, an unauthenticated attacker can instantiate an attacker-controlled backend on demand. For the WebDAV backend, `bearer_token_command` is executed during backend initialization, making single-request unauthenticated local command execution possible on reachable RC deployments without global HTTP authentication. Version 1.73.5 patches the issue.
- CVSS 4.0
- 9.2 CRITICALCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 8.58% probability · 95th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-78, CWE-306, CWE-94
- Affected
- rclone/rclone
- Source
- security-advisories@github.com
References
- https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/backend/webdav/webdav.goProduct
- https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/operations/rc.goProduct
- https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/cache.goProduct
- https://github.com/rclone/rclone/commit/2a9e952b38e03a96bf40c9eb6e8e22199865ee3b
- https://github.com/rclone/rclone/releases/tag/v1.73.5
- https://github.com/rclone/rclone/security/advisories/GHSA-jfwf-28xr-xw6qExploit, Vendor Advisory
- https://rclone.org/changelog/#v1-73-5-2026-04-19
- https://access.redhat.com/security/cve/CVE-2026-41179
- https://bugzilla.redhat.com/show_bug.cgi?id=2460988
- https://github.com/rclone/rclone/security/advisories/GHSA-jfwf-28xr-xw6qExploit, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41179.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.