{"id":"EUVD-2026-38292","revision":null,"records":[{"revision":"5f328a59bfcc4c3cbaa36bf3703fcae9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-50170","aliases":[],"title":"Angular: Information Leak via Default Caching of Credentialed Requests in HttpTransferCache","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. 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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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.2,"severity":null}],"references":["https://github.com/angular/angular/security/advisories/GHSA-q6f4-qqrg-jv6x","https://github.com/angular/angular/pull/67964"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38292","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 22, 2026, 3:39:08 PM","dateUpdated":"Jun 23, 2026, 4:00:21 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. 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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.\n\n### Impact\n\nSuccessful exploitation allows an unauthenticated attacker to obtain sensitive, user-specific information of other authenticated users. This occurs when:\n\n* The SSR-rendered HTML containing the cached private data is stored in a shared cache (e.g., CDN, reverse proxy).  \n* Subsequent requests for the same page receive the cached HTML containing the first user's private data.\n\n### Attack Preconditions\n\n* **SSR and Hydration Enabled:** The Angular application must be configured to use Server-Side Rendering and hydration (e.g., using `provideClientHydration()`).  \n* **Credentialed Requests during SSR:** The application must perform HTTP requests that require user-specific authentication (using cookies or `withCredentials: true`) during the initial server-side render.  \n* **Shared Caching:** The application's HTML responses must be cached by a shared caching layer (CDN, reverse proxy, or server-side cache) without proper cache-control headers to distinguish authenticated users.\n\n### Patches\n- 22.0.0-rc.2\n- 21.2.15\n- 20.3.22\n- 19.2.23","state":0,"publishedAt":"2026-06-15T16:51:53+00:00","modifiedAt":"2026-09-10T03:50:50.0915045+00:00","affected":[{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"22.0.0-next.0"},{"kind":"fixed","version":"22.0.0-rc.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"20.0.0-next.0"},{"kind":"fixed","version":"20.3.22"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"19.0.0-next.0"},{"kind":"fixed","version":"19.2.23"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"18.2.14"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"21.0.0-next.0"},{"kind":"fixed","version":"21.2.15"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":null,"severity":null},{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/angular/angular/security/advisories/GHSA-q6f4-qqrg-jv6x","https://nvd.nist.gov/vuln/detail/CVE-2026-50170","https://github.com/angular/angular/pull/67964","https://github.com/angular/angular"],"sourceUrl":"https://github.com/advisories/GHSA-q6f4-qqrg-jv6x","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-q6f4-qqrg-jv6x","identifiers":["GHSA-q6f4-qqrg-jv6x","CVE-2026-50170"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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