CVE-2026-116196
Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
- State
- Published
- Severity
- 6.0 Medium
- Published
- Oct 25, 2026
- Updated
- Oct 25, 2026
- Reserved
- Oct 25, 2026
Description
Rclone before v1.75.2 contains a credential exposure vulnerability in the b2 backend that leaks the live account Authorization token and SSE-C keys on HTTP redirects from --b2-download-url hosts. Attackers can observe a same-host HTTPS-to-HTTP downgrade redirect to capture the cleartext B2 token, or receive cross-host redirects disclosing SSE-C customer encryption keys.
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 |
|
References
- GitHub Security Advisory (GHSA-gpw7-77cq-9f72)vendor-advisory
- VulnCheck Advisory: Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-urlthird-party-advisory
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