CVE-2026-79780 rclone before v1.75.0 Credential Exposure via S3 Redirect
Attackers can capture IBM IAM tokens and SSE-C keys via S3 redirects, enabling unauthorized access to protected storage objects.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-79780?
CVE-2026-79780 is a medium-severity vulnerability in rclone, published on 25 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2026-79780?
4 open source packages ship an affected version, including github.com/rclone/rclone and rclone.
| Package | Affected | Fixed in |
|---|---|---|
github.com/rclone/rclone Go | All versions | 1.75.0 |
github.com/rclone/rclone Go | All versions | 1.75.0 |
github.com/rclone/rclone Go | All versions | 1.75.0 |
rclone Bitnami | All versions | 1.75.0 |
How do I fix CVE-2026-79780?
Upgrade github.com/rclone/rclone to 1.75.0 or later.
Is CVE-2026-79780 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79780 exists.
Sources
Also known as BIT-rclone-2026-79780, DEBIAN-CVE-2026-79780, GHSA-8mxv-9xhp-86h4, GHSA-fj78-v5f5-cphq, GO-2026-6188, MINI-686p-hjhq-f8ff and 8 more.