CVE-2026-79779 rclone before v1.75.0 WebDAV Credential Exposure via HTTPS-to-HTTP Redirect
An on-path attacker can capture credentials via HTTPS-to-HTTP redirects in rclone, enabling unauthorized WebDAV access and data theft.
- 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-2026-79779?
CVE-2026-79779 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 versions before v1.75.0 fail to reject transport downgrades in redirect handling, allowing Basic authorization and Cookie headers to be replayed over plaintext HTTP after same-host HTTPS-to-HTTP redirects. An on-path attacker observing the plaintext hop can capture and reuse credentials to perform WebDAV operations with the compromised account's permissions.
Weakness: CWE-319
Which versions are affected by CVE-2026-79779?
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-2026-79779?
Upgrade github.com/rclone/rclone to 1.75.0 or later.
Is CVE-2026-79779 being exploited?
There is no known exploitation of CVE-2026-79779 in the wild and no public exploit code.
Sources
Also known as BIT-rclone-2026-79779, DEBIAN-CVE-2026-79779, GHSA-9mph-vxjp-r3rx, GHSA-h4mf-4v27-hggj, GO-2026-6197, MINI-33wg-rg8j-jc2g and 8 more.