---
id: CVE-2026-79781
title: >-
  rclone serve s3 before 1.74.4 contains a path traversal vulnerability that
  allows attackers to read and overwrite root-level files by using dot-dot
  segments in S3 object keys
summary: >-
  rclone serve s3 before 1.74.4 contains a path traversal vulnerability that
  allows attackers to read and overwrite root-level files by using dot-dot
  segments in S3 object keys. Attackers can send requests with object keys like
  ../root-sec…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-22
vendor: rclone
product: github.com/rclone/rclone
affected:
  - github.com/rclone/rclone < 1.74.4
patched:
  - github.com/rclone/rclone 1.74.4
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-2026-79781'
references:
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/rclone-serve-s3-path-traversal-via-dot-dot-object-keys
    label: disclosure@vulncheck.com
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-8v25-v8p6-qf7v'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://github.com/rclone/rclone/commit/83d1e62aa9e0dbd10a5d7eb34c117ae997268cdf
  - url: >-
      https://github.com/rclone/rclone/commit/c89b766cf417fddbe7eace40d31262ecb85bfa93
  - url: 'https://github.com/rclone/rclone'
  - url: 'https://github.com/rclone/rclone/releases/tag/v1.74.4'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79781.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-79781'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2523572'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-79781'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79781'
tags:
  - nvd
  - osv
  - go
  - csaf
  - vex
  - red-hat
epss: 0.00343
epssPercentile: 0.25063
aliases:
  - GHSA-8v25-v8p6-qf7v
  - GO-2026-6189
ecosystem: go
ingestedAt: '2026-08-27T19:27:46.582Z'
---

## Overview

rclone serve s3 before 1.74.4 contains a path traversal vulnerability that allows attackers to read and overwrite root-level files by using dot-dot segments in S3 object keys. Attackers can send requests with object keys like ../root-secret.txt to escape the bucket namespace and access files in the serve root directory.

## Remediation

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

## Package advisory (CVE-2026-79781)

Affected packages:

- `github.com/rclone/rclone < 1.74.4`

Patched in:

- `github.com/rclone/rclone 1.74.4`

Source: https://osv.dev/vulnerability/GHSA-8v25-v8p6-qf7v

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Cryostat 4, Red Hat Advanced Cluster Management for Kubernetes 2 · no fix planned: Cryostat 4, Red Hat Advanced Cluster Management for Kubernetes 2 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79781.json)