CVE-2026-9595

描述

### Impact When a user-configured proxy on `webpack-dev-server` has a broad context (e.g. `/`) and `ws: true`, it also intercepts the dev server's own HMR WebSocket and forwards it to the proxy target. This leaks the browser's cookies and `Origin` header to the backend, bypasses the dev server's Host/Origin validation, and corrupts the HMR socket (both HMR and the proxy end up writing to the same socket). ### Patches Fixed in `webpack-dev-server` 5.2.5. ### Workarounds Scope user-defined proxy `context` to specific paths instead of `/`, or omit `ws: true` from the proxy entry when WebSocket forwarding is not required.

如何修補 CVE-2026-9595

要修補 CVE-2026-9595,請將受影響套件升級到下列已修補版本。

• —升級至 5.2.5 或更新版本

CVE-2026-9595 正在被利用嗎?

目前沒有被利用訊號。CVE-2026-9595 既不在 CISA KEV 也沒有最新的 EPSS 分數。

受影響套件(1)

• from 0, < 5.2.5

CVSS 分數

參考連結(7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-9595
• PATCHgithub.com/webpack/webpack-dev-server
• WEBcna.openjsf.org/security-advisories.html
• WEBgithub.com/facebook/create-react-app/pull/7444
• WEB