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CVE-2026-116196

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

MEDIUM
5.3
CVSS Score
Published: October 25, 2026 at 01:20 PM UTC
Updated: October 27, 2026 at 02:12 PM UTC
1 product affected across 1 vendorRclone

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.1%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Rclone· Rclonego
95%
v < 1.75.2
Vendor states this is fixed in 1.75.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

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

CVSS

5.3MEDIUMVulnCheck
Attack Vector
ADJACENT_NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-319

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