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js · @angular/service-workerCritical

@angular/service-worker information disclosure on cross-origin redirects

On cross-origin redirects, the Service Worker fails to strip sensitive headers (e.

16 Jun 2026Read 1 minSeverity: act now

What changed

On cross-origin redirects, the Service Worker fails to strip sensitive headers (e.g., Authorization, Proxy-Authorization, cookies), violating the Fetch redirect algorithm.

Who it affects

Applications using @angular/service-worker that fetch assets with credential headers and may encounter cross-origin redirects.

What to do today

Update @angular/service-worker to patched version 22.0.1, 21.2.17, or 20.3.25 immediately.

The trail
Collected Audited Written Published