---
id: CVE-2026-88044
title: >-
  rclone is a command-line program to sync files and directories to and from
  different cloud storage providers
summary: >-
  rclone is a command-line program to sync files and directories to and from
  different cloud storage providers. From 1.70.0 until 1.75.1, the serve/start
  RC interface accepts per-server proxyOpt.AuthProxy settings, and the FTP and
  S3 const…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-863
vendor: rclone
product: rclone
affected:
  - 'rclone >= 1.70.0, < 1.75.1'
published: '2026-09-10'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T19:54:25.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88044'
references:
  - url: >-
      https://github.com/rclone/rclone/commit/739403963abf6f58003c2becd5f7c4ad0d644153
    label: security-advisories@github.com
  - url: 'https://github.com/rclone/rclone/releases/tag/v1.75.1'
    label: security-advisories@github.com
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-p569-5gjg-9cmj'
    label: security-advisories@github.com
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-p569-5gjg-9cmj'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88044'
  - url: 'https://github.com/rclone/rclone'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88044.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-88044'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-88044'
tags:
  - nvd
  - cve.org
  - exploit-available
  - osv
  - go
  - csaf
  - vex
  - red-hat
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-10T17:14:25.073045Z'
ingestedAt: '2026-09-14T02:48:08.739Z'
epss: 0.0056
epssPercentile: 0.44273
aliases:
  - GHSA-p569-5gjg-9cmj
  - GO-2026-6460
  - BIT-rclone-2026-88044
ecosystem: go
patched:
  - github.com/rclone/rclone 1.75.1
---

## Overview

rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.70.0 until 1.75.1, the serve/start RC interface accepts per-server proxyOpt.AuthProxy settings, and the FTP and S3 constructors in cmd/serve/ftp/ftp.go and cmd/serve/s3/server.go incorrectly check the process-global proxy.Opt.AuthProxy value instead. When the global value is empty, the request-local authentication proxy is ignored: FTP falls back to the fixed filesystem with username anonymous and any password, while S3 with AuthKey serves the fixed RC fs rather than the backend selected by the proxy. The dedicated command-line servers that configure the global option are not affected. This issue is fixed in version 1.75.1.

## Remediation

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

## Package advisory (CVE-2026-88044)

Affected packages:

- `github.com/rclone/rclone >= 1.70.0, < 1.75.1`

Patched in:

- `github.com/rclone/rclone 1.75.1`

Source: https://osv.dev/vulnerability/GHSA-p569-5gjg-9cmj

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88044.json)