PatchSiren cyber security CVE debrief
CVE-2026-71311 rclone CVE debrief
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T21:16:58.727Z and has not been modified since then. The vulnerability affects rclone versions prior to 1.75.0, specifically in the FTP functionality. A valid but nondefault FTP filename encoding can restore raw CR/LF immediately before an attacker-controlled path is interpolated into the line-oriented FTP control channel. This allows 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. The issue is fixed in version 1.75.0, which properly handles FTP filename encoding. Users of rclone should verify their versions and update if necessary. Additionally, defenders should review FTP usage and monitor for suspicious activity, especially in environments with multiple FTP destinations or privilege escalation potential.
- Vendor
- rclone
- Product
- Unknown
- CVSS
- MEDIUM 6.4
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-08-05
- Original CVE updated
- 2026-08-05
- Advisory published
- 2026-08-05
- Advisory updated
- 2026-08-05
Who should care
Users of rclone versions prior to 1.75.0 who utilize FTP functionality, especially in environments with multiple FTP destinations or privilege escalation potential, should be aware of this vulnerability. This includes operators, platform administrators, vulnerability management teams, and security teams responsible for ensuring the secure configuration and monitoring of rclone deployments.
Technical summary
A valid but nondefault FTP filename encoding in rclone prior to 1.75.0 can restore raw CR/LF immediately before an attacker-controlled path is interpolated into the line-oriented FTP control channel. This allows 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. The issue is fixed in version 1.75.0, which properly handles FTP filename encoding.
Defensive priority
Medium-priority defensive review recommended due to potential for authenticated FTP command injection.
Recommended defensive actions
- Review and apply patch to rclone version 1.75.0 or later
- Restrict FTP access to trusted users and networks
- Monitor FTP activity for suspicious commands
- Review compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
Evidence notes
Evidence from the NVD and GitHub indicates a valid but nondefault FTP filename encoding issue in rclone prior to 1.75.0, allowing potential injection of independent authenticated FTP commands. The issue is fixed in version 1.75.0. Users should verify their rclone versions and update if necessary. Additionally, defenders should review FTP usage and monitor for suspicious activity.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T21:16:58.727Z and has not been modified since then.