---
title: "CVE-2026-41179: RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution"
url: https://erroneo.us/security/cve/CVE-2026-41179/
description: "CVE-2026-41179 (github.com/rclone/rclone (Go)): Rclone is a command-line program to sync files and directories to and from different cloud storage…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-04-23
date_modified: 2026-07-15
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-41179"
kev: false
cvss: 9.2
epss: 0.05299
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 5.3% , percentile 93: FIRST’s model estimates a 5.3% chance of exploitation activity in the next 30 days, higher than 93% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/rclone/rclone (Go) >= 1.48.0, <= 1.73.4, fixed in 1.73.5 . Check your lockfile, including transitive dependencies.

## What it is

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, bearertokencommand 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.

## Affected packages

- Go `github.com/rclone/rclone` >= 1.48.0, <= 1.73.4 → fixed: 1.73.5

## Affected products (CVE record)

- rclone rclone: >= 1.48.0, < 1.73.5

## Severity

- GitHub_M CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
- redhat-SADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 5.30% probability of exploitation activity in the next 30 days; percentile 93.

## Sources

- [GitHub Advisory GHSA-jfwf-28xr-xw6q](https://github.com/advisories/GHSA-jfwf-28xr-xw6q)
- [CVE.org record CVE-2026-41179](https://www.cve.org/CVERecord?id=CVE-2026-41179)
- [NVD entry CVE-2026-41179](https://nvd.nist.gov/vuln/detail/CVE-2026-41179)
- [github.com](https://github.com/rclone/rclone/security/advisories/GHSA-jfwf-28xr-xw6q)
- [github.com](https://github.com/rclone/rclone/commit/2a9e952b38e03a96bf40c9eb6e8e22199865ee3b)
- [github.com](https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/backend/webdav/webdav.go)
- [github.com](https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/operations/rc.go)
- [github.com](https://github.com/rclone/rclone/blob/bf55d5e6d37fd86164a87782191f9e1ffcaafa82/fs/rc/cache.go)
- [github.com](https://github.com/rclone/rclone/releases/tag/v1.73.5)
- [rclone.org](https://rclone.org/changelog/#v1-73-5-2026-04-19)
- [access.redhat.com](https://access.redhat.com/security/cve/CVE-2026-41179)
- [RHBZ#2460988](https://bugzilla.redhat.com/show_bug.cgi?id=2460988)
- [security.access.redhat.com](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41179.json)

---
Source page: https://erroneo.us/security/cve/CVE-2026-41179/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt