---
id: CVE-2026-79780
title: >-
  rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C
  encryption keys during S3 redirect callbacks, allowing credentials to be
  preserved across scheme or host changes
summary: >-
  rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C
  encryption keys during S3 redirect callbacks, allowing credentials to be
  preserved across scheme or host changes. Attackers observing network traffic
  from a trusted …
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'
cwe:
  - CWE-200
vendor: rclone
product: github.com/rclone/rclone
affected:
  - github.com/rclone/rclone < 1.75.0
patched:
  - github.com/rclone/rclone 1.75.0
published: '2026-08-25'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T20:46:19.780'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79780'
references:
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/rclone-before-credential-exposure-via-s3-redirect
    label: disclosure@vulncheck.com
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://github.com/rclone/rclone/commit/7543a7a87884aca957590b20b0714078d51af87b
  - url: >-
      https://github.com/rclone/rclone/commit/9328763d1b73db71e97c0332b19e3747abeb9191
  - url: 'https://github.com/rclone/rclone'
  - url: 'https://github.com/rclone/rclone/releases/tag/v1.75.0'
tags:
  - nvd
  - osv
  - go
epss: 0.00095
epssPercentile: 0.00769
aliases:
  - GHSA-8mxv-9xhp-86h4
  - GO-2026-6188
ecosystem: go
ingestedAt: '2026-08-27T19:27:46.515Z'
---

## Overview

rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host HTTPS-to-HTTP downgrades or SSE-C keys on cross-origin redirects to access protected S3 objects.

## Remediation

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

## Package advisory (CVE-2026-79780)

Affected packages:

- `github.com/rclone/rclone < 1.75.0`

Patched in:

- `github.com/rclone/rclone 1.75.0`

Source: https://osv.dev/vulnerability/GHSA-8mxv-9xhp-86h4