---
id: CVE-2026-116630
title: >-
  undici vulnerable to cross-user information disclosure via cross-origin
  redirect revalidation
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, when an Agent composes the redirect and shared cache
  interceptors, a cached response that is revalidated with a conditional request
  can be v…
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-346
  - CWE-524
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: '2026-11-06T10:13:44.685Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116630'
references:
  - url: 'https://github.com/nodejs/undici/security/advisories/GHSA-5rm8-gv32-r954'
  - url: 'https://cna.openjsf.org/security-advisories.html'
tags:
  - cve.org
ingestedAt: '2026-11-06T10:49:35.398Z'
epss: 0.00148
epssPercentile: 0.03999
---

## 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, when an Agent composes the redirect and shared cache interceptors, a cached response that is revalidated with a conditional request can be validated by a 304 Not Modified from a different origin. When the origin that stored the response redirects the conditional revalidation request to another origin, the redirect handler strips origin-bound credential headers but not the cache-generated If-None-Match or If-Modified-Since validators, so the redirect destination receives the original origin's validator and undici treats its 304 as successful revalidation of the stored representation. As a result, a shared cache can serve the original origin's stored authenticated response, including one gated by Authorization, to a later unauthenticated caller. 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, compose the interceptors as cache then redirect, use per-origin dispatchers and cache stores, or disable shared caching on redirect-capable requests.

## 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.