CVE-2026-116196

MEDIUM 5.3

Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-319
Vendor	rclone
Product	rclone
Published	Oct 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

rclone / rclone

0 < 1.75.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/rclone/rclone/security/advisories/GHSA-gpw7-77cq-9f72 vulncheck.com: https://www.vulncheck.com/advisories/rclone-before-1.75.2-b2-credential-leak-on-redirect-via-b2-download-url

Credits

🔍 sonicnew 🔍 iaohkut ncw