CVE-2026-79780: Rclone

Medium severity, CVSS 5.3. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Rclone Rclone: before 1.75.0 (fixed in 1.75.0)

Published 2026-08-25. Last modified 2026-09-10.