CVE-2026-50170: Angular

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• Angular Angular: up to and including 18.2.14; from 19.0.0, before 19.2.23 (fixed in 19.2.23); from 20.0.0, before 20.3.22 (fixed in 20.3.22); from 21.0.0, before 21.2.15 (fixed in 21.2.15); version 22.0.0 only

Published 2026-06-22. Last modified 2026-07-09.