CVE-2026-14620
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…
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- webpack_devserver 5.2.5 - CSRF2026-08-17 · webapps · multiple
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | webpack-dev-server | <= 5.2.5 | 5.2.6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Webpack.Js | Webpack-Dev-Server | before 5.2.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-f5vj-f2hx-8m93
- https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-f5vj-f2hx-8m93
- https://nvd.nist.gov/vuln/detail/CVE-2026-14620
- https://github.com/webpack/webpack-dev-server/pull/5698
- https://github.com/webpack/webpack-dev-server/commit/80cd9eea54975fe632a518d8bd902a260f374e7c
- https://cna.openjsf.org/security-advisories.html
- https://github.com/webpack/webpack-dev-server/releases/tag/v5.2.6