What’s Vulnerable › Vulnerabilities
CVE-2026-116196: Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-25 · updated 2026-10-27
- Weakness: CWE-319
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.
Affected products
How to fix
Upgrade to a fixed version: rclone 1.75.2; rclone 1.75.2. Check the vendor advisory for mitigations.
References
- https://github.com/rclone/rclone/security/advisories/GHSA-gpw7-77cq-9f72
- https://www.vulncheck.com/advisories/rclone-before-1.75.2-b2-credential-leak-on-redirect-via-b2-download-url
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