CVE-2026-14631

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Source
https://cve.org/CVERecord?id=CVE-2026-14631
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-14631.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-14631
Aliases
Downstream
Published
2026-07-03T17:23:41.451Z
Modified
2026-07-15T01:48:51.980524787Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-20",
        "CWE-248"
    ],
    "cna_assigner": "openjs",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14631.json"
}
References

Affected packages

Git / github.com/webpack/webpack-dev-server

Affected ranges

Type
GIT
Repo
https://github.com/webpack/webpack-dev-server
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8a37b0ed89d07ca81532188fe19f080a2ee51475
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:webpack.js:webpack-dev-server:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "5.2.6"
        }
    ]
}

Affected versions

v1.*
v1.10.0
v1.10.1
v1.11.0
v1.12.0
v1.12.1
v1.13.0
v1.14.0
v1.14.1
v1.7.0
v1.8.0
v1.8.1
v1.8.2
v1.9.0
v2.*
v2.0.0-beta
v2.1.0-beta.0
v2.1.0-beta.1
v2.1.0-beta.10
v2.1.0-beta.11
v2.1.0-beta.12
v2.1.0-beta.2
v2.1.0-beta.3
v2.1.0-beta.4
v2.1.0-beta.5
v2.1.0-beta.6
v2.1.0-beta.7
v2.1.0-beta.8
v2.1.0-beta.9
v2.10.0
v2.10.1
v2.11.0
v2.11.1
v2.2.0
v2.2.0-rc.0
v2.2.1
v2.3.0
v2.4.0
v2.4.1
v2.4.2
v2.4.3
v2.4.4
v2.4.5
v2.5.0
v2.6.0
v2.6.1
v2.8.0
v2.8.1
v2.8.2
v2.9.0
v2.9.1
v2.9.2
v2.9.3
v2.9.5
v2.9.6
v2.9.7
v3.*
v3.0.0
v3.0.1-beta.0
v3.1.0
v3.1.1
v3.1.10
v3.1.11
v3.1.12
v3.1.13
v3.1.14
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.1.7
v3.1.8
v3.1.9
v3.10.0
v3.10.2
v3.10.3
v3.11.0
v3.2.0
v3.2.1
v3.3.0
v3.3.1
v3.4.0
v3.4.1
v3.5.0
v3.5.1
v3.7.0
v3.7.1
v3.7.2
v3.8.0
v3.8.1
v3.8.2
v3.9.0
v4.*
v4.0.0
v4.0.0-beta.0
v4.0.0-beta.1
v4.0.0-beta.2
v4.0.0-beta.3
v4.0.0-rc.0
v4.0.0-rc.1
v4.1.0
v4.1.1
v4.10.0
v4.10.1
v4.11.0
v4.11.1
v4.12.0
v4.13.0
v4.13.1
v4.13.2
v4.13.3
v4.14.0
v4.15.0
v4.15.1
v4.2.0
v4.2.1
v4.3.0
v4.3.1
v4.4.0
v4.5.0
v4.6.0
v4.7.0
v4.7.1
v4.7.2
v4.7.3
v4.7.4
v4.8.0
v4.8.1
v4.9.0
v4.9.1
v4.9.2
v4.9.3
v5.*
v5.0.0
v5.0.1
v5.0.2
v5.0.3
v5.0.4
v5.1.0
v5.2.0
v5.2.1
v5.2.2
v5.2.3
v5.2.4
v5.2.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-14631.json"