---
id: CVE-2026-116187
title: >-
  Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart
  Uploads
summary: >-
  Rclone from v1.68.0 before v1.75.2 contains an authorization bypass
  vulnerability in serve s3 --auth-proxy that allows authenticated tenants to
  manipulate other tenants' multipart uploads by referencing their upload IDs.
  Attackers who le…
severity: medium
cvss: 5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-639
vendor: rclone
product: rclone
affected:
  - rclone >= 1.68.0 < 1.75.2
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T13:20:23.849Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116187'
references:
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-35g6-9fjv-rmx5'
    label: GitHub Security Advisory (GHSA-35g6-9fjv-rmx5)
  - url: >-
      https://www.vulncheck.com/advisories/rclone-1.68.0-before-1.75.2-authorization-bypass-in-serve-s3-multipart-uploads
    label: >-
      VulnCheck Advisory: Rclone v1.68.0 before v1.75.2 Authorization Bypass in
      serve s3 Multipart Uploads
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.944Z'
---

## Overview

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

## Affected

- `rclone >= 1.68.0 < 1.75.2`

## Remediation

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