CVE-2026-79779

EUVD-2026-65537
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
5.3 MEDIUM
ADJACENT_NETWORK
HIGH
NONE
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
rclonerclone
𝑥
< 1.75.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
rclone
bookworm
vulnerable
bullseye
vulnerable
sid
vulnerable
trixie
vulnerable
Common Weakness Enumeration
References
https://github.com/rclone/rclone/security/advisories/GHSA-h4mf-4v27-hggj
https://www.vulncheck.com/advisories/rclone-before-webdav-credential-exposure-via-https-to-http-redirect