---
id: CVE-2026-111756
title: follow-redirects array-form headers bypass cross-origin credential stripping
summary: >-
  follow-redirects is a Node.js HTTP and HTTPS client wrapper that automatically
  follows redirects. From version 1.16.0 to before version 1.16.1,
  follow-redirects removes sensitive credential headers (Authorization,
  Proxy-Authorization, Co…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-200
  - CWE-212
vendor: follow-redirects
product: follow-redirects
affected:
  - 'follow-redirects >= 1.16.0, < 1.16.1'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T17:58:21.005Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111756'
references:
  - url: >-
      https://github.com/follow-redirects/follow-redirects/security/advisories/GHSA-q3jh-wrc6-jgq8
    label: >-
      https://github.com/follow-redirects/follow-redirects/security/advisories/GHSA-q3jh-wrc6-jgq8
  - url: >-
      https://github.com/follow-redirects/follow-redirects/commit/9865ca45490e4d0f7b6944870318408344570aff
    label: >-
      https://github.com/follow-redirects/follow-redirects/commit/9865ca45490e4d0f7b6944870318408344570aff
  - url: 'https://github.com/follow-redirects/follow-redirects/releases/tag/v1.16.1'
    label: 'https://github.com/follow-redirects/follow-redirects/releases/tag/v1.16.1'
  - url: 'https://github.com/advisories/GHSA-q3jh-wrc6-jgq8'
tags:
  - cve.org
  - ghsa
  - npm
aliases:
  - GHSA-q3jh-wrc6-jgq8
ecosystem: npm
patched:
  - follow-redirects 1.16.1
ingestedAt: '2026-10-20T18:14:37.213Z'
---

## Overview

follow-redirects is a Node.js HTTP and HTTPS client wrapper that automatically follows redirects. From version 1.16.0 to before version 1.16.1, follow-redirects removes sensitive credential headers (Authorization, Proxy-Authorization, Cookie, and any caller-declared sensitiveHeaders) before following a redirect that crosses to a different host or downgrades to a less secure protocol. The removal routine iterates the caller's headers container with for...in and matches header names against a filter. This assumes the headers container is a plain object keyed by header names. Node's underlying http.request, which follow-redirects is a drop-in replacement for, also accepts headers as an alternating array of names and values. For an array, for...in yields the numeric indices "0", "1", "2" and so on, which never match a header-name filter, so nothing is removed. An application that sends array-form headers and follows an attacker-controlled cross-origin redirect therefore forwards its Authorization, Cookie, and Proxy-Authorization headers verbatim to the attacker-controlled destination, with no error or warning. The sensitiveHeaders option added to fix CVE-2026-40895 / GHSA-r4q5-vmmm-2653 is equally ineffective, because it relies on the same helper. This is an unauthenticated confidentiality vulnerability: any remote server the victim application contacts can harvest the victim's credential headers by responding with a cross-origin redirect. This issue has been patched in version 1.16.1.

## Affected

- `follow-redirects >= 1.16.0, < 1.16.1`

## Remediation

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

## Package advisory (CVE-2026-111756)

Affected packages:

- `follow-redirects >= 1.16.0, < 1.16.1`

Patched in:

- `follow-redirects 1.16.1`

Source: https://github.com/advisories/GHSA-q3jh-wrc6-jgq8