CVE-2026-14631 (GCVE-0-2026-14631)

Vulnerability from cvelistv5 – Published: 2026-07-03 17:23 – Updated: 2026-07-03 17:23
VLAI
Title
webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header
Summary
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 malformed Origin header. The malformed value causes an uncaught exception in the host-validation path and crashes the dev server. Impact is limited to availability of the development server, no data disclosure, no code execution. Patches: upgrade to webpack-dev-server 5.2.6. Workarounds: keep the dev server bound to localhost (the default) and do not expose it to untrusted networks.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-20 - Improper Input Validation
  • CWE-248 - Uncaught Exception
Assigner
References
Impacted products
Vendor Product Version
webpack-dev-server webpack-dev-server Affected: 0 , < 5.2.6 (semver)
Unaffected: 5.2.6 (semver)
Create a notification for this product.
Credits
Str1ckl4nd bjohansebas UlisesGascon
Show details on NVD website
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