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Rclone 1.48.x < 1.73.5 Command Injection (CVE-2026-41179)

critical Nessus Plugin ID 310055

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Synopsis

An application installed on the remote host is affected by a command injection vulnerability.

Description

The version of Rclone installed on the remote host is 1.48.x prior to 1.73.5. It is, therefore, affected by a command injection vulnerability:

 - The RC endpoint operations/fsinfo is exposed without AuthRequired 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 command execution possible on reachable RC deployments without global HTTP authentication. (CVE-2026-41179)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Rclone version 1.73.5 or later.

See Also

http://www.nessus.org/u?79614501

Plugin Details

Severity: Critical

ID: 310055

File Name: rclone_CVE-2026-41179.nasl

Version: 1.3

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 4/24/2026

Updated: 4/28/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-41179

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 8.2

Threat Vector: CVSS:4.0/E:P

Vector: 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

Vulnerability Information

CPE: cpe:/a:rclone:rclone

Required KB Items: installed_sw/rclone

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/19/2026

Vulnerability Publication Date: 4/19/2026

Reference Information

CVE: CVE-2026-41179

IAVB: 2026-B-0105