CVE-2026-41176 Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution
Unauthenticated attackers can disable RC authentication to access administrative functions and execute commands on exposed rclone servers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41176?
CVE-2026-41176 is a critical authentication bypass vulnerability in rclone, published on 22 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. The RC endpoint `options/set` is exposed without `AuthRequired: true`, but it can mutate global runtime configuration, including the RC option block itself. Starting in version 1.45.0 and prior to version 1.73.5, an unauthenticated attacker can set `rc.NoAuth=true`, which disables the authorization gate for many RC methods registered with `AuthRequired: true` on reachable RC servers that are started without global HTTP authentication. This can lead to unauthorized access to sensitive administrative functionality, including configuration and operational RC methods. Version 1.73.5 patches the issue.
Which versions are affected by CVE-2026-41176?
4 open source packages ship an affected version, including github.com/rclone/rclone and rclone. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/rclone/rclone Go | All versions | 1.73.5 |
github.com/rclone/rclone Go | From 1.45.0 | 1.73.5 |
github.com/rclone/rclone Go | From 1.45.0 | 1.73.5 |
rclone Bitnami | From 1.45.0 | 1.73.5 |
Products include Rclone Rclone.
How do I fix CVE-2026-41176?
Upgrade github.com/rclone/rclone to 1.73.5 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-41176 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41176 exists.
Public exploit code: 1 Nuclei template.
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-2026-41179 RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local 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-2026-41176, DEBIAN-CVE-2026-41176, GHSA-25qr-6mpr-f7qx, GO-2026-4964, JLSEC-2026-280, MINI-4jx4-487c-p5vr and 7 more.