Vulnerability · Published Aug 5, 2026 · Assigned by GitHub_M
CVE-2026-71311rclone: FTP Command Arguments Permit CRLF Injection When Custom Encoding Preserves Newlines
Medium 6.4
In plain English
A medium-severity security flaw in rclone from rclone. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rclone | no fix listed | DEBIAN-CVE-2026-71311 |
| Debian:13 | rclone | no fix listed | DEBIAN-CVE-2026-71311 |
| Go | github.com/rclone/rclone | 1.75.0 | GHSA-8c48-q9wj-3w37 |
| Go | github.com/rclone/rclone | 1.75.0 | GO-2026-6187 |
| Ubuntu:26.10 | rclone | no fix listed | UBUNTU-CVE-2026-71311 |
Affected products (as reported)
Weakness: CWE-93 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H
References
- https://github.com/rclone/rclone/security/advisories/GHSA-8c48-q9wj-3w37 x_refsource_CONFIRM
- https://github.com/rclone/rclone/commit/1df2b70753286c1dfe8366078cbedfdf7f96472c x_refsource_MISC
- https://github.com/rclone/rclone/releases/tag/v1.75.0 x_refsource_MISC