CVE-2026-41179 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution
Unauthenticated attackers can execute local commands via the operations/fsinfo endpoint if the RC server is enabled without global authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41179?
CVE-2026-41179 is a critical command injection vulnerability in rclone, published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-41179?
5 open source packages ship an affected version, including github.com/rclone/rclone, rclone and github.com/ncw/rclone. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/rclone/rclone Go | From 1.48.0 | 1.73.5 |
github.com/rclone/rclone Go | From 1.48.0 | 1.73.5 |
github.com/rclone/rclone Go | From 1.49.0 | 1.73.5 |
rclone Bitnami | From 1.48.0 | 1.73.5 |
github.com/ncw/rclone Go | From 1.48.0 | None |
Products include Rclone Rclone.
How do I fix CVE-2026-41179?
Upgrade github.com/rclone/rclone to 1.73.5 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-41179 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41179 exists.
Public exploit code: 1 Nuclei template and 2 proofs of concept on GitHub.
Other vulnerabilities in rclone
- CVE-2026-88018 rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass
- CVE-2026-49980 Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix
- CVE-2026-41176 Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
- CVE-2026-59733 rclone `serve restic --private-repos` authorization bypass: `..` in the URL path lets an authenticated user read, overwrite and delete other users' repositories
- CVE-2026-116191 Rclone before 1.75.2 Path Traversal via serve webdav MKCOL
Sources
Also known as BIT-rclone-2026-41179, DEBIAN-CVE-2026-41179, GHSA-jfwf-28xr-xw6q, GO-2026-5466, JLSEC-2026-281, MINI-967h-wf84-m7j9 and 7 more.