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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/rclone/rclone/commit/1df2b70753286c1dfe8366078cbedfdf7f96472c
- https://github.com/rclone/rclone/releases/tag/v1.75.0
- https://github.com/rclone/rclone/security/advisories/GHSA-8c48-q9wj-3w37
- https://github.com/rclone/rclone/security/advisories/GHSA-8c48-q9wj-3w37
FAQ
What is CVE-2026-71311?
CVE-2026-71311 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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 re...
How severe is CVE-2026-71311?
CVE-2026-71311 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-71311?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.