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NVD Vulnerability Details :
CVE-2026-14631
Received
More InfoOfficial Page
Source-ce714d77-add3-4f53-aff5-83d477b104bb
View Known Exploited Vulnerability (KEV) details
Published At-03 Jul, 2026 | 18:16
Updated At-03 Jul, 2026 | 18:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-20Secondaryce714d77-add3-4f53-aff5-83d477b104bb
CWE-248Secondaryce714d77-add3-4f53-aff5-83d477b104bb
CWE ID: CWE-20
Type: Secondary
Source: ce714d77-add3-4f53-aff5-83d477b104bb
CWE ID: CWE-248
Type: Secondary
Source: ce714d77-add3-4f53-aff5-83d477b104bb
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://cna.openjsf.org/security-advisories.htmlce714d77-add3-4f53-aff5-83d477b104bb
N/A
https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-m28w-2pqf-7qgjce714d77-add3-4f53-aff5-83d477b104bb
N/A
Hyperlink: https://cna.openjsf.org/security-advisories.html
Source: ce714d77-add3-4f53-aff5-83d477b104bb
Resource: N/A
Hyperlink: https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-m28w-2pqf-7qgj
Source: ce714d77-add3-4f53-aff5-83d477b104bb
Resource: N/A
Change History
0Changes found

Details not found