---
id: CVE-2026-120415
title: >-
  undici vulnerable to cross-origin credential disclosure via array-of-tuples
  headers bypassing redirect stripping
summary: >-
  undici is an HTTP client for Node.js. In versions 7.0.0 through 7.30.1 and
  8.0.0 through 8.12.3, the redirect interceptor strips sensitive headers such
  as Authorization, Cookie, Proxy-Authorization, and Host when a request is
  redirected …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-200
  - CWE-212
vendor: undici
product: undici
affected:
  - undici >= 7.0.0 < 7.30.2
  - undici >= 8.0.0 < 8.12.4
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T10:10:48.653Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120415'
references:
  - url: 'https://github.com/nodejs/undici/security/advisories/GHSA-9v6h-8rgp-m69f'
  - url: 'https://cna.openjsf.org/security-advisories.html'
tags:
  - cve.org
ingestedAt: '2026-11-06T10:49:35.399Z'
epss: 0.003
epssPercentile: 0.22891
---

## Overview

undici is an HTTP client for Node.js. In versions 7.0.0 through 7.30.1 and 8.0.0 through 8.12.3, the redirect interceptor strips sensitive headers such as Authorization, Cookie, Proxy-Authorization, and Host when a request is redirected to a different origin, but when request headers are supplied as an array of name and value tuples (a valid documented input, for example from Object.entries), the redirect handler misreads them as a flat list so the header names never match and the sensitive headers are not removed. If a header-normalizing interceptor such as cache or deduplicate is composed outside the redirect interceptor, it then serializes the retained headers onto the cross-origin request, disclosing the caller's origin-bound credentials to the unrelated redirect destination. This is a representation-dependent bypass of the cross-origin header stripping added in CVE-2024-30260. The issue is fixed in undici 7.30.2 and 8.12.4, and users should upgrade to one of those versions or later. As a workaround, supply request headers as a plain object or a flat name and value array rather than an array of tuples, or compose the redirect interceptor outside the normalizing interceptor.

## Affected

- `undici >= 7.0.0 < 7.30.2`
- `undici >= 8.0.0 < 8.12.4`

## Remediation

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