@angular/service-worker vulnerabilities

A vulnerability in the @angular/service-worker package strips explicit security parameters (credentials and cache mode) during request reconstruction by the Angular Service Worker. This causes the browser to include active credentials where they should be omitted and caches private resources locally, leading to potential session leaks and persistent private data.

A vulnerability in the @angular/service-worker package causes the Service Worker to strip strict redirect policies (e.g., redirect: 'error') during request reconstruction, falling back to the browser's default 'follow' behavior. This can lead to unintended following of HTTP 3xx redirects, potentially exposing cookies, credentials, or session-restricted data.

An information disclosure vulnerability exists in the @angular/service-worker package of Angular prior to versions 22.0.1, 21.2.17, and 20.3.25. When fetching assets, the Service Worker preserves sensitive headers (e.g., Authorization, Proxy-Authorization, session cookies) on cross-origin redirects, violating the Fetch redirect algorithm. A remote attacker can obtain these credentials by triggering a redirect to an untrusted external origin.