Missing Authentication for Critical Function Affecting github.com/rclone/rclone/cmd/serve/s3 package, versions <1.75.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMRCLONERCLONECMDSERVES3-20158631
- published27 Sept 2026
- disclosed10 Sept 2026
- creditUnknown
Introduced: 10 Sep 2026
NewCVE-2026-88018 Â (opens in a new tab)How to fix?
Upgrade github.com/rclone/rclone/cmd/serve/s3 to version 1.75.1 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authentication for Critical Function in the authentication process when the --auth-proxy option is enabled without also setting --auth-key. An attacker can gain unauthorized access by supplying any access key ID and signing requests with an empty secret, resulting in successful authentication without valid credentials.