CVE-2026-50184
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages.
Impact
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 explicit client-defined safety parameters: the credentials configuration (such as credentials: 'omit') and the HTTP cache mode configuration (such as cache: 'no-store'). These are reverted back to standard browser-default parameters (credentials: 'same-origin' and default HTTP cache properties). This causes the browser to include active credentials (such as cookies or Authorization headers) on outbound requests where the client-side developer explicitly instructed they should be omitted, leading to potential session leaks. Additionally, it causes private or non-cacheable resources to be cached by the service worker's engine, making private page states accessible or persistent inside the client's local cache post-logout. This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @angular/service-worker | >= 22.0.0-next.0, < 22.0.0-rc.2 | 22.0.0-rc.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Angular | Angular | through 18.2.14 from 19.0.0 before 19.2.23 from 20.0.0 before 20.3.22 from 21.0.0 before 21.2.15 Version 22.0.0 |