{"id":"CVE-2026-50170","aliases":["GHSA-q6f4-qqrg-jv6x"],"url":"https://o3.security/vulnerability/CVE-2026-50170","summary":"Angular: Information Leak via Default Caching of Credentialed Requests in HttpTransferCache","details":"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.","published":"2026-06-22T15:39:08.877Z","modified":"2026-08-12T03:51:48.177278753Z","cvss":null,"epss":{"score":0.00268,"percentile":0.18687,"asOf":"2026-08-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@angular/common","fixedVersion":"22.0.0-rc.2"},{"ecosystem":"npm","name":"@angular/common","fixedVersion":"20.3.22"},{"ecosystem":"npm","name":"@angular/common","fixedVersion":"19.2.23"},{"ecosystem":"npm","name":"@angular/common","fixedVersion":null},{"ecosystem":"npm","name":"@angular/common","fixedVersion":"21.2.15"}],"fix":{"url":"https://github.com/angular/angular/pull/67964","label":"angular/angular#67964"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50170.json"},{"type":"ADVISORY","url":"https://github.com/angular/angular/security/advisories/GHSA-q6f4-qqrg-jv6x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50170"},{"type":"FIX","url":"https://github.com/angular/angular/pull/67964"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:48.177278753Z"}}