---
id: CVE-2026-79779
title: >-
  rclone versions before v1.75.0 fail to reject transport downgrades in redirect
  handling, allowing Basic authorization and Cookie headers to be replayed over
  plaintext HTTP after same-host HTTPS-to-HTTP redirects
summary: >-
  rclone versions before v1.75.0 fail to reject transport downgrades in redirect
  handling, allowing Basic authorization and Cookie headers to be replayed over
  plaintext HTTP after same-host HTTPS-to-HTTP redirects. An on-path attacker
  obse…
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-319
  - CWE-523
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-2026-79779'
references:
  - url: 'https://github.com/rclone/rclone/security/advisories/GHSA-h4mf-4v27-hggj'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/rclone-before-webdav-credential-exposure-via-https-to-http-redirect
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/rclone/rclone/commit/59b513b0e74fd2943ccbb8891d5ce00f860e6d26
  - url: 'https://github.com/rclone/rclone'
  - url: 'https://github.com/rclone/rclone/releases/tag/v1.75.0'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79779.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-79779'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2523550'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-79779'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79779'
tags:
  - nvd
  - osv
  - go
  - csaf
  - vex
  - red-hat
epss: 0.00108
epssPercentile: 0.01347
aliases:
  - GHSA-h4mf-4v27-hggj
  - GO-2026-6197
ecosystem: go
ingestedAt: '2026-08-27T19:27:47.257Z'
---

## Overview

rclone versions before v1.75.0 fail to reject transport downgrades in redirect handling, allowing Basic authorization and Cookie headers to be replayed over plaintext HTTP after same-host HTTPS-to-HTTP redirects. An on-path attacker observing the plaintext hop can capture and reuse credentials to perform WebDAV operations with the compromised account's permissions.

## Remediation

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

## Package advisory (CVE-2026-79779)

Affected packages:

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

Patched in:

- `github.com/rclone/rclone 1.75.0`

Source: https://osv.dev/vulnerability/GHSA-h4mf-4v27-hggj

## 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-2026-79779.json)