Exposure of Data Element to Wrong Session Affecting rclone-debuginfo package, versions <0:1.75.1-1.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.23% (13th percentile)

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  • Snyk IDSNYK-AMZN2023-RCLONEDEBUGINFO-20247072
  • published29 Sept 2026
  • disclosed10 Sept 2026

Introduced: 10 Sep 2026

CVE-2026-88017  (opens in a new tab)
CWE-488  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 rclone-debuginfo to version 0:1.75.1-1.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3129.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rclone-debuginfo package and not the rclone-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.