---
id: "CVE-2026-116190"
kind: "vulnerability"
aliases: ["CVE-2026-116190"]
title: "rclone: WebDAV backend leaks custom auth headers across redirects"
severity: "medium"
cvss: 6.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "rclone", "self-hosted", "webdav"]
not_affected_if: ["no-custom-headers", "no-webdav-backend", "rclone-1.75.2-or-later"]
published_at: "2026-10-25T14:16:59+00:00"
first_seen_at: "2026-10-25T14:41:23+00:00"
updated_at: "2026-10-25T14:42:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116190", "first_seen_at": "2026-10-25T14:41:23+00:00"}]
---

# rclone: WebDAV backend leaks custom auth headers across redirects

rclone's WebDAV backend forwards operator-configured custom credential headers, such as X-Auth-Token set via --webdav-headers, to a different host when the server answers with an HTTP 3xx redirect. An attacker who controls or influences a cross-host redirect can capture those headers and replay them against the original WebDAV service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `rclone version` and check whether it is older than `v1.75.2`
- Look for `--webdav-headers` or a `headers` setting for WebDAV remotes in rclone configs and scripts

## Fix

- Upgrade rclone to `v1.75.2` or later
- Rotate any token that was sent through `--webdav-headers` if the remote could have redirected to another host

## Timeline

- 2026-10-25T14:41:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116190

## From the sources

rclone from v1.56.0 before v1.75.2 contains an information disclosure vulnerability in the WebDAV backend that forwards operator-configured custom credential headers to different hosts on HTTP 3xx redirects. Attackers who control or influence a cross-host redirect can capture headers such as X-Auth-Token set via --webdav-headers and replay them against the original WebDAV service.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_