---
id: CVE-2026-116196
title: Rclone before v1.75.2 B2 Credential Leak on Redirect via --b2-download-url
summary: >-
  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-t…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-319
vendor: rclone
product: rclone
affected:
  - rclone < 1.75.2
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T13:20:29.804Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116196'
references:
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-gpw7-77cq-9f72'
    label: GitHub Security Advisory (GHSA-gpw7-77cq-9f72)
  - url: >-
      https://www.vulncheck.com/advisories/rclone-before-1.75.2-b2-credential-leak-on-redirect-via-b2-download-url
    label: >-
      VulnCheck Advisory: Rclone before v1.75.2 B2 Credential Leak on Redirect
      via --b2-download-url
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.942Z'
---

## Overview

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

- `rclone < 1.75.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.