CVE-2026-79780

Medium

Description

rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host HTTPS-to-HTTP downgrades or SSE-C keys on cross-origin redirects to access protected S3 objects.

SeverityMedium

CVSS5.3

Exploit probability—

ProductGithub.com/rclone/rclone

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-200Sensitive information exposure

How to fix

Update

github.com/rclone/rclone1.75.0 or later

Vendor advisories

github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4

Affected products

Product	Affected versions	Fixed in
github.com/rclone/rcloneGo	v < 1.75.0	1.75.0

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