---
id: CVE-2026-85152
title: >-
  undici 8.10.0 omits the destination origin from the cache and
  request-deduplication keys when the cache or deduplicate interceptor is
  composed directly onto a Client or Pool
summary: >-
  undici 8.10.0 omits the destination origin from the cache and
  request-deduplication keys when the cache or deduplicate interceptor is
  composed directly onto a Client or Pool. Because the internal cache key falls
  back to an empty origin s…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-346
vendor: nodejs
product: undici
affected:
  - 'undici >= 8.10.0, < 8.10.2'
patched:
  - undici 8.10.2
published: '2026-09-04'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:41:35.683'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85152'
references:
  - url: 'https://cna.openjsf.org/security-advisories.html'
    label: ce714d77-add3-4f53-aff5-83d477b104bb
  - url: 'https://github.com/nodejs/undici/security/advisories/GHSA-vp8m-p9jh-q5pm'
    label: ce714d77-add3-4f53-aff5-83d477b104bb
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85152.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-85152'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528717'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-85152'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85152'
  - url: 'https://access.redhat.com/errata/RHSA-2026:63782'
  - url: 'https://access.redhat.com/errata/RHSA-2026:54438'
  - url: 'https://access.redhat.com/errata/RHSA-2026:54389'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00164
epssPercentile: 0.06058
ingestedAt: '2026-09-08T19:08:49.593Z'
---

## Overview

undici 8.10.0 omits the destination origin from the cache and request-deduplication keys when the cache or deduplicate interceptor is composed directly onto a Client or Pool. Because the internal cache key falls back to an empty origin string, a cacheable or in-flight response from one upstream origin is returned for a request to a different, trusted origin whenever the method, path, and relevant headers match, which permits cross-origin information disclosure and persistent cache poisoning. The reporter demonstrated a full authentication bypass in which a JWT signed with an attacker-controlled key was accepted as belonging to a trusted issuer, and the trusted origin was never contacted. This is a regression introduced in 8.10.0 and affects undici versions from 8.10.0 up to 8.10.2. Applications using an Agent, which carries the origin in its dispatch options, are not affected. Users should upgrade to undici 8.10.2.

## Affected

- `undici >= 8.10.0, < 8.10.2`

## Remediation

Upgrade past the affected range:

- `undici 8.10.2`

## Vendor advisories

- **RHSA-2026:63782** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:63782)
- **RHSA-2026:54438** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-12 · [advisory](https://access.redhat.com/errata/RHSA-2026:54438)
- **RHSA-2026:54389** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-12 · [advisory](https://access.redhat.com/errata/RHSA-2026:54389)
- **Red Hat VEX** · Important · affected: Exploit Intelligence, OpenShift Pipelines, Red Hat AMQ Broker 7, Red Hat Build of Podman Desktop, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, … · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85152.json)