SEPTEMBER 15, 2026
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Case File

CVE-2026-88017

HIGH · CVSS 7.3 EPSS 0.23% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-10 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The FTP auth-proxy driver in rclone versions 1.64.0 to 1.75.1 is vulnerable due to improper handling of user credentials, allowing a later login with the same username to overwrite the password stored for that user. This can lead to unauthorized access, enabling an attacker to manipulate files across different proxy backends if they exploit the vulnerability while a session is still active. Organizations using affected versions of rclone for file synchronization should prioritize upgrading to version 1.75.1 to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-88017
Severity
HIGH
CVSS
7.3
EPSS
0.23%

Original NVD Description

rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.64.0 until 1.75.1, the FTP auth-proxy driver in cmd/serve/ftp/ftp.go stores one obscured password per username in the server-wide userPass map[string]string instead of binding the credential or VFS to the authenticated session. If two accepted credentials use the same username but resolve to different proxy backends, a later CheckPasswd login overwrites userPass[user], and subsequent getVFS operations on the first session are reauthorized with the later password. The first session can then read, create, overwrite, rename, or delete objects using the second credential’s backend authority. Exploitation requires the later same-username login to occur while the first session remains open. This issue is fixed in version 1.75.1.

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