CVE-2026-50170
Description
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.
How to fix
- angular angular19.2.23, 20.3.22, 21.2.15 or later
- @angular/common22.0.0-rc.2, 20.3.22, 19.2.23, 21.2.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| angular angular | v ≤ 18.2.14, 19.0.0 ≤ v < 19.2.23, 20.0.0 ≤ v < 20.3.22, 21.0.0 ≤ v < 21.2.15, 22.0.0 | 19.2.23, 20.3.22, 21.2.15 |
| @angular/commonnpm | 22.0.0-next.0 ≤ v < 22.0.0-rc.2, 20.0.0-next.0 ≤ v < 20.3.22, 19.0.0-next.0 ≤ v < 19.2.23, v ≤ 18.2.14, 21.0.0-next.0 ≤ v < 21.2.15 | 22.0.0-rc.2, 20.3.22, 19.2.23, 21.2.15 |
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Attack Surface Management
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