CVE-2026-50170
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, a vulnerability was discovered in @angular/common when Server-Side Rendering (SSR) and hydration are enabled. The HttpTransferCache utility optimizes hydration by caching outgoing HTTP requests performed during SSR and transferring the cached state to the client-side application via TransferState. However, the caching mechanism fails to inspect the withCredentials flag or the Cookie header of outgoing requests. As a result, credentialed, user-specific responses may be cached by default in the shared TransferState payload. When these responses are serialized into the HTML, any caching layer (such as a CDN, reverse proxy, or shared server cache) that caches the SSR-rendered HTML page could inadvertently cache and leak one user's private data to other users, leading to a high-severity information disclosure vulnerability. 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/common | >= 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 |