What is CVE-2026-14631?

CVE-2026-14631 is a medium-severity vulnerability in Webpack-dev-server, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-07-03.

How severe is CVE-2026-14631?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in Webpack-dev-server

CVE-2026-14631

webpack-dev-server versions 5.2.5 and earlier terminate the whole Node.js process when an unauthenticated peer sends either a normal HTTP request with a malformed Host header or a WebSocket upgrade to the default /ws endpoint with a malfor…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Webpack-dev-server — versions 0, 5.2.6

Weakness classification (CWE)

CWE-20 — Improper Input Validation
CWE-248

References

ce714d77-add3-4f53-aff5-83d477b104bb
ce714d77-add3-4f53-aff5-83d477b104bb

Frequently asked questions

What is CVE-2026-14631?: CVE-2026-14631 is a medium-severity vulnerability in Webpack-dev-server, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-07-03.
How severe is CVE-2026-14631?: Medium severity. CVSS v3 base score is 5.3 out of 10.