Angular: SSRF via protocol-relative and backslash URLs in Angular Platform-Server — CVE-2026-41423

Summary

### Impact A [Server-Side Request Forgery (SSRF)](https://developer.mozilla.org/en-US/docs/Web/Security/Attacks/SSRF) vulnerability exists in `@angular/platform-server` due to improper handling of URLs during Server-Side Rendering (SSR). When an attacker sends a request such as `GET /\evil.com/ HTTP/1.1` the server engine (Express, etc.) passes the URL string to Angular’s rendering functions. Because the URL parser…

Product

npm: @angular/platform-server

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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