CVE-2026-85152

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://cna.openjsf.org/security-advisories.html	Vendor Advisory
https://github.com/nodejs/undici/security/advisories/GHSA-vp8m-p9jh-q5pm	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*

History

16 Sep 2026, 20:41

Type	Values Removed	Values Added
First Time		Nodejs Nodejs undici
CPE		cpe:2.3:a:nodejs:undici::::::node.js::*
References	~~() https://cna.openjsf.org/security-advisories.html -~~	() https://cna.openjsf.org/security-advisories.html - Vendor Advisory
References	~~() https://github.com/nodejs/undici/security/advisories/GHSA-vp8m-p9jh-q5pm -~~	() https://github.com/nodejs/undici/security/advisories/GHSA-vp8m-p9jh-q5pm - Vendor Advisory

Information

Published : 2026-09-04 17:17

Updated : 2026-09-16 20:41

NVD link : CVE-2026-85152

Mitre link : CVE-2026-85152

CVE.ORG link : CVE-2026-85152

JSON object : View

Products Affected

nodejs

undici

CWE

CWE-346

Origin Validation Error

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