---
id: CVE-2026-111756
title: >-
  follow-redirects: follow-redirects: Information disclosure via array-formatted
  headers during cross-origin redirects (CVE-2026-111756)
summary: >-
  A flaw was found in follow-redirects. When an application provides request
  headers in an array format, the library fails to remove sensitive credential
  headers before following a redirect to another host or an insecure protocol. A
  remote, …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: vendor
cwe:
  - CWE-212
  - CWE-200
vendor: Red Hat
product: Red Hat Hardened Images
affected:
  - hardened_images
patched:
  - hardened_images
published: '2026-10-20'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T05:02:12+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111756.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111756.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-111756'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2556370'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-111756'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111756'
  - url: >-
      https://github.com/follow-redirects/follow-redirects/commit/9865ca45490e4d0f7b6944870318408344570aff
  - url: 'https://github.com/follow-redirects/follow-redirects/releases/tag/v1.16.1'
  - url: >-
      https://github.com/follow-redirects/follow-redirects/security/advisories/GHSA-q3jh-wrc6-jgq8
  - url: 'https://access.redhat.com/errata/RHSA-2026:88478'
  - url: 'https://access.redhat.com/errata/RHSA-2026:88537'
  - url: 'https://access.redhat.com/errata/RHSA-2026:88541'
  - url: 'https://github.com/advisories/GHSA-q3jh-wrc6-jgq8'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - exploit-available
  - ghsa
  - npm
epss: 0.00471
epssPercentile: 0.40573
aliases:
  - GHSA-q3jh-wrc6-jgq8
ecosystem: npm
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-23T01:59:05.315622Z'
scores:
  vendor: 7.5
  cna: 8.2
ingestedAt: '2026-10-20T18:14:37.213Z'
---

## Overview

A flaw was found in follow-redirects. When an application provides request headers in an array format, the library fails to remove sensitive credential headers before following a redirect to another host or an insecure protocol. A remote, untrusted server can exploit this flaw by issuing a redirect to capture authentication tokens and session cookies, leading to sensitive information disclosure.

## Vendor advisories

- **RHSA-2026:88478** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:88478)
- **RHSA-2026:88537** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:88537)
- **RHSA-2026:88541** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:88541)
- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111756.json)

**follow-redirects: follow-redirects: Information disclosure via array-formatted headers during cross-origin redirects** — rated Important by Red Hat. Released 2026-10-20, updated 2026-10-23.

Affected:

- Red Hat Hardened Images

Fixed:

- Red Hat Hardened Images

No fix planned:

- Red Hat Hardened Images

Not affected:

- Red Hat Hardened Images

## Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:88478
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:88537
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:88541

Workarounds / mitigations:

- --- CME Mitigation Guidance (2026-10-20) ---
Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.

The highest-value action is to format all outgoing HTTP request headers as plain key-value objects rather than al…

## 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