CVE-2026-14620
4.7 · MEDIUMOverview
CVE-2026-14620 is a medium-severity vulnerability affecting webpack.js webpack-dev-server. It was published on July 3, 2026 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
webpack-dev-server versions 5.2.5 and earlier expose two internal developer endpoints, /webpack-dev-server/open-editor and /webpack-dev-server/invalidate, that perform state-changing actions on any GET request without verifying that the request originated from the dev server's own page. Any website a developer visits while the dev server is running can trigger these endpoints cross-origin with no interaction beyond the visit. An attacker can open an arbitrary existing local file in the developer's editor, including files outside the project root, and repeated requests can spawn editor processes and force recompilations that degrade the developer's machine. Patches: upgrade to webpack-dev-server 5.2.6. Workarounds: none.
Remediation
Check the references section for vendor advisories and patches from webpack.js. Update webpack-dev-server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| webpack.js | webpack-dev-server | >= 0, < 5.2.6 | Affected |
Frequently Asked Questions
What is CVE-2026-14620?
CVE-2026-14620 is a medium-severity vulnerability affecting webpack.js webpack-dev-server. It was published on July 3, 2026 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
How severe is CVE-2026-14620?
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-14620?
Check the references section for vendor advisories and patches from webpack.js. Update webpack-dev-server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-14620?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-14620 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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Browser-based exploitation validates findings with real proof-of-concept.
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