Vulnerability in Rclone
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/rclone/rclone/security/advisories/GHSA-gpw7-77cq-9f72 (vendor-advisory)
- www.vulncheck.com/advisories/rclone-before-1.75.2-b2-credential-leak-on-redirec… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116196?
- CVE-2026-116196 is a medium-severity vulnerability in Rclone, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.3/10. Published 2026-10-25.
- How severe is CVE-2026-116196?
- Medium severity. CVSS v3 base score is 5.3 out of 10.