Vulnerability Intelligence Report
Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
CVE-2026-116196
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.
No Active Exploit Signals
CVSS Base Score
6.0
MEDIUM
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-319 ↗Cleartext Transmission of Sensitive Information
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| rclone | rclone | 0 < 1.75.2 (affected), 1.75.2 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-10-25T12:27:12 |
| Published | 2026-10-25T13:20:29 |
| Patch Date | 2026-10-09 |
| Last Updated | 2026-10-25T13:20:29 |
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