Insufficiently protected credentials in rclone - #VU140656
Published: August 1, 2026
Vulnerability identifier: #VU140656
CSH Severity: Medium
CVSS v4: 6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-522
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to insufficiently protected credentials in the S3 redirect callback when following unsafe redirects that change scheme or host. A remote attacker can induce a redirect that causes IBM IAM bearer tokens or SSE-C key headers to be forwarded to an unintended destination to disclose sensitive information.
The issue affects same-host HTTPS-to-HTTP redirects for IBM IAM bearer authorization and cross-origin redirects for SSE-C and copy-source SSE-C key headers.
Affected software
rclone
Remediation
Install security update from vendor's website.
rclone - update to 1.75.0