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CVE-2026-50169

Angular Service Worker Policy-Bypass & Credential-Stripping Vulnerabilities PUBLISHED

Description (CNA)

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.15 20.3.22, and 19.2.23, an issue in the @angular/service-worker package compromises the integrity of request-policy enforcement during request reconstruction. When the Angular Service Worker intercepts network requests for matched assets, it reconstructs a new Request object using an internal helper function. During this reconstruction process, the helper function strips the strict, client-defined request redirect policy configuration (such as redirect: 'error'), falling back to the browser's default 'follow' strategy. If the target web application makes client-side requests with a strict policy (e.g., expecting a network error instead of automatically following redirects), the service worker will bypass this instruction and automatically follow HTTP 3xx redirects to other destinations. This acts as an unintended proxy/intermediary ("Confused Deputy") and can result in cookie/credential exposure or same-origin session-restricted data leakage if public dynamic routes redirect to sensitive routes. This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.

Affected (CNA)

Vendor / productVersions
angular / angularaffected >= 22.0.0-next.0, < 22.0.0-rc.2; affected >= 21.0.0-next.0, < 21.2.15; affected >= 20.0.0-next.0, < 20.3.22; affected >= 19.0.0-next.0, < 19.2.23; affected <= 18.2.14

CWE

CWE-200, CWE-441, CWE-524

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.