Rclone up to 1.73.4 RC Endpoint operations/fsinfo bearer_token_command os command injection

Summaryinfo

A vulnerability labeled as critical has been found in Rclone up to 1.73.4. This impacts the function bearer_token_command of the file operations/fsinfo of the component RC Endpoint. The manipulation results in os command injection. This vulnerability is reported as CVE-2026-41179. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Rclone up to 1.73.4. Affected is the function bearer_token_command of the file operations/fsinfo of the component RC Endpoint. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-41179 since 04/17/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 314577 (Amazon Linux 2 : rclone, --advisory ALAS2-2026-3285 (ALAS-2026-3285)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.73.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (314577). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Rclone

Version

• 1.73.0
• 1.73.1
• 1.73.2
• 1.73.3
• 1.73.4

Website

• Product: https://github.com/rclone/rclone/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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