CVE-2026-41179 PoC — RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-41179.yaml

Associated Vulnerability

Title: RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution (CVE-2026-41179)
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.

Description

Rclone >= 1.48.0 and < 1.73.5 contains an unauthenticated local command execution caused by unauthenticated access to the RC endpoint operations/fsinfo with attacker-controlled fs input, letting unauthenticated attackers execute local commands, exploit requires reachable RC deployment without global HTTP authentication.

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

View subscription plans →