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CVE-2026-71311— rclone: FTP Command Arguments Permit CRLF Injection When Custom Encoding Preserves Newlines

Quick assessment

Affected
rclone rclone
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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团队开源的一个支持多协议的数据同步工具。 Rclone 1.75.0之前版本存在输入验证错误漏洞，该漏洞源于backend/ftp/ftp.go中FTP文件名编码处理不当，攻击者可利用CR/LF注入独立的认证FTP命令，当受害者复制或同步文件到更高权限的FTP目的地时可能导致任意FTP命令执行。

CVSS 6.4 · Medium EPSS 0.39% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
rclone rclone < 1.75.0 affected
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I. Basic Information for CVE-2026-71311

Vulnerability Information
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Vulnerability Title
rclone: FTP Command Arguments Permit CRLF Injection When Custom Encoding Preserves Newlines
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. Prior to 1.75.0, a valid but nondefault FTP filename encoding in backend/ftp/ftp.go can restore raw CR/LF immediately before an attacker-controlled path is interpolated into the line-oriented FTP control channel, and github.com/jlaffaye/ftp formats the argument through textproto.Conn.Cmd without rejecting CR or LF, allowing a filename such as victim CRLF DELE other-secret CRLF NOOP to inject an independent authenticated FTP command when the victim copies or syncs to a more-privileged FTP destination. This issue is fixed in 1.75.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Rclone 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rclone是Rclone团队开源的一个支持多协议的数据同步工具。 Rclone 1.75.0之前版本存在输入验证错误漏洞，该漏洞源于backend/ftp/ftp.go中FTP文件名编码处理不当，攻击者可利用CR/LF注入独立的认证FTP命令，当受害者复制或同步文件到更高权限的FTP目的地时可能导致任意FTP命令执行。
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 < 1.75.0 -

II. Public POCs for CVE-2026-71311

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III. Intelligence Information for CVE-2026-71311

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Patches & Fixes for CVE-2026-71311 (1)

Vendor Advisories for CVE-2026-71311 (1)

Vendor Pages for CVE-2026-71311 (1)

Same Patch Batch · rclone · 2026-08-05 · 5 CVEs total

CVE-2026-71309 8.6 HIGH rclone: Incomplete path validation allows backend root escape in serve restic
CVE-2026-71312 8.0 HIGH rclone: PowerShell Smart-Quote Filename Injection Enables SFTP Server-Side Command Executi
CVE-2026-71313 6.9 MEDIUM rclone: Local Encoding Path Traversal
CVE-2026-71310 5.9 MEDIUM rclone: Unbounded HTTP CONNECT Response Headers Can Exhaust rclone Memory

IV. Related Vulnerabilities

Same product: rclone
Same vendor: rclone
Same weakness: CWE-93

V. Comments for CVE-2026-71311

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