Deserialization of Untrusted Data Affecting rclone package, versions <0:1.74.2-80.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.33% (25th percentile)

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  • Snyk IDSNYK-AMZN2023-RCLONE-17288903
  • published10 Jun 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39832  (opens in a new tab)
CWE-502  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 rclone to version 0:1.74.2-80.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1810.

NVD Description

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

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

CVSS Base Scores

version 3.1