What is CVE-2026-120474?

CVE-2026-120474 is a medium-severity vulnerability in Undici, classified under Use of Cache Containing Sensitive Information. CVSS score: 6.5/10. Published 2026-11-06.

How severe is CVE-2026-120474?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Undici

CVE-2026-120474

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 the redirect interceptor and a shared response cache are used together, an authenticated request that is redirected to a same-origin target has the final response stored under the original request's cache key. That key omits the credential and carries no Vary header, so a later anonymous or different user can be served the first user's private response body. This results in cross-user disclosure of cached private responses. The issue is fixed in undici 7.30.2 and 8.12.4, and users should upgrade to one of those versions or later.

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Undici

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-120474?: CVE-2026-120474 is a medium-severity vulnerability in Undici, classified under Use of Cache Containing Sensitive Information. CVSS score: 6.5/10. Published 2026-11-06.
How severe is CVE-2026-120474?: Medium severity. CVSS v3 base score is 6.5 out of 10.