CVE-2026-79779

rclone before v1.75.0 WebDAV Credential Exposure via HTTPS-to-HTTP Redirect

State: Published
Severity: 6.0 Medium
Published: Aug 25, 2026
Updated: Aug 27, 2026
Reserved: Aug 25, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.0 Medium	CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	5.3 Medium	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	VulnCheck

Weaknesses

CWE-319 Cleartext Transmission of Sensitive Information

Affected Products

Product	Versions
rclonerclone	before 1.75.0Affected 1.75.0Not affected

References

GitHub Security Advisory (GHSA-h4mf-4v27-hggj)vendor-advisory
VulnCheck Advisory: rclone before v1.75.0 WebDAV Credential Exposure via HTTPS-to-HTTP Redirectthird-party-advisory

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