Insufficiently protected credentials in rclone - #VU155811
Published: October 15, 2026
Vulnerability identifier: #VU155811
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-522
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose custom credential headers to an unintended host.
The vulnerability exists due to insufficient protection of custom credential headers in the WebDAV backend when following cross-host HTTP redirects. A remote attacker can influence the configured server's redirect response to disclose custom credential headers to an unintended host.
Exploitation requires a WebDAV remote configured with a custom credential header through the headers option. The auth_redirect option does not need to be enabled, and the redirect must not downgrade HTTPS to HTTP.
Affected software
rclone
Remediation
Install security update from vendor's website.
rclone - update to 1.75.2