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CVE-2026-49980— Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix

Quick assessment

Affected
rclone rclone
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rclone是Rclone团队开源的一款同步文件到各类云存储服务的命令行工具。 Rclone 1.46.0版本至1.74.3之前版本存在授权问题漏洞，该漏洞源于rclone rcd --rc-serve接受未经身份验证的GET和HEAD请求到路径/[remote:path]/object，远程值从URL解析并传递给正常后端初始化，内联远程配置可在初始化期间设置执行本地命令的后端选项，可能导致单个未经身份验证的GET或HEAD请求以rclone进程用户身份执行命令。

CVSS 9.8 · Critical EPSS 0.78% · P55

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
rclone rclone >= 1.46.0, < 1.74.3 affected
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I. Basic Information for CVE-2026-49980

Vulnerability Information
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Vulnerability Title
Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix
Source: CVE Program / CVE List V5
Vulnerability Description
Rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.46.0 until 1.74.3, rclone rcd --rc-serve accepts unauthenticated GET and HEAD requests to paths of the form: /[remote:path]/object. The remote value is parsed from the URL and passed to normal backend initialization. Inline remote configuration can set backend options that execute local commands during initialization. As a result, a single unauthenticated GET or HEAD request can execute a command as the rclone process user. This vulnerability is fixed in 1.74.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Rclone 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rclone是Rclone团队开源的一款同步文件到各类云存储服务的命令行工具。 Rclone 1.46.0版本至1.74.3之前版本存在授权问题漏洞，该漏洞源于rclone rcd --rc-serve接受未经身份验证的GET和HEAD请求到路径/[remote:path]/object，远程值从URL解析并传递给正常后端初始化，内联远程配置可在初始化期间设置执行本地命令的后端选项，可能导致单个未经身份验证的GET或HEAD请求以rclone进程用户身份执行命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rclone rclone >= 1.46.0, < 1.74.3 -

II. Public POCs for CVE-2026-49980

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7531 chars
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III. Intelligence Information for CVE-2026-49980

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Vendor Advisories for CVE-2026-49980 (1)

IV. Related Vulnerabilities

Same product: rclone
Same vendor: rclone
Same weakness: CWE-306

V. Comments for CVE-2026-49980

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