---
id: CVE-2026-88045
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 1.75.0 until 1.75.1, the serve S3
  streamed multipart path in cmd/serve/s3/multipart.go passes
  attacker-controlled contentL…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-789
vendor: rclone
product: rclone
affected:
  - 'rclone >= 1.75.0, < 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-2026-88045'
references:
  - url: >-
      https://github.com/rclone/rclone/commit/7c1dfd99f3e6a22fcefd8686cc478226a15e63a1
    label: security-advisories@github.com
  - url: >-
      https://github.com/rclone/rclone/commit/ab1f458013aaf6356e4bdeca61f7cb9139f8eb86
    label: security-advisories@github.com
  - url: 'https://github.com/rclone/rclone/issues/9616'
    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-2p48-j3qc-rx9f'
    label: security-advisories@github.com
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-2p48-j3qc-rx9f'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88045'
  - url: 'https://github.com/rclone/rclone'
tags:
  - nvd
  - cve.org
  - exploit-available
  - osv
  - go
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-10T17:31:12.490937Z'
ingestedAt: '2026-09-14T02:48:06.704Z'
epss: 0.0063
epssPercentile: 0.47968
aliases:
  - GHSA-2p48-j3qc-rx9f
  - GO-2026-6456
  - BIT-rclone-2026-88045
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 1.75.0 until 1.75.1, the serve S3 streamed multipart path in cmd/serve/s3/multipart.go passes attacker-controlled contentLength to multipart.NewRW().Reserve before reading request-body bytes. waitForTurn admits the current part and one oversized part when the buffer is empty despite --multipart-streaming-buffer-limit, and lib/pool allocates 1 MiB pages according to Content-Length or X-Amz-Decoded-Content-Length. A network client can retain or multiply these reservations without sending the declared body, exhausting process or host memory or permanently blocking request handlers. Anonymous S3 deployments require no credentials, while deployments using auth_key require an accepted S3 key. 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-2026-88045)

Affected packages:

- `github.com/rclone/rclone >= 1.75.0, < 1.75.1`

Patched in:

- `github.com/rclone/rclone 1.75.1`

Source: https://osv.dev/vulnerability/GHSA-2p48-j3qc-rx9f