Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-09-10T19:00:12 Angular: Angular: Information Leak via HttpTransferCache Bypass 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N CWE-524

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.28, 21.2.20, and 22.1.1, Angular's @angular/common HttpTransferCache can cache an authenticated response when Server-Side Rendering (SSR) and hydration use a hierarchical HttpClient configured with withRequestsMadeViaParent. The child TransferCache evaluates an initially anonymous request before delegation, then a parent withInterceptors chain adds an Authorization header, cookie, or API token; although the parent cache skips the authenticated request, the child still stores the private response in TransferState serialized as JSON in the ng-state script. Exploitation requires provideClientHydration, child provideHttpClient delegation through withRequestsMadeViaParent, parent-level credential injection, and an SSR HTML response shared across users by a CDN, reverse proxy, or application cache. A later unauthenticated or unauthorized visitor can receive the cached HTML containing the earlier authenticated user's sensitive response data. Applications can mitigate by attaching credentials at the child, filtering sensitive endpoints with withHttpTransferCacheOptions, disabling transfer caching for sensitive routes, or marking personalized HTML private or no-store. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.1.

A flaw was found in Angular. When Server-Side Rendering (SSR) and hydration are used with a hierarchical HttpClient configured with `withRequestsMadeViaParent`, the `HttpTransferCache` can improperly cache authenticated responses. This occurs because a child TransferCache stores private response data in TransferState even when a parent HttpClient chain adds credentials and skips the authenticated request. Consequently, a later unauthenticated or unauthorized visitor could receive cached HTML containing sensitive data from a previously authenticated user, leading to information disclosure.

A-MQ Interconnect 1 Out of support scope qpid-dispatch Red Hat Ceph Storage 4 Out of support scope rhceph/rhceph-4-dashboard-rhel8 Red Hat Enterprise Linux 10 Fix deferred firefox Red Hat Enterprise Linux 10 Fix deferred gjs Red Hat Enterprise Linux 10 Fix deferred grafana Red Hat Enterprise Linux 10 Fix deferred thunderbird Red Hat Enterprise Linux 7 Fix deferred firefox Red Hat Enterprise Linux 8 Fix deferred grafana Red Hat Enterprise Linux 8 Fix deferred mozjs60 Red Hat Enterprise Linux 9 Fix deferred grafana Red Hat Fuse 7 Out of support scope angular Red Hat OpenStack Platform 16.2 Out of support scope qpid-dispatch Red Hat Quay 3 Out of support scope quay/quay-rhel8 Red Hat Quay 3 Fix deferred quay/quay-rhel9 Red Hat Single Sign-On 7 Out of support scope rh-sso-server-dist.zip https://www.cve.org/CVERecord?id=CVE-2026-88059 https://nvd.nist.gov/vuln/detail/CVE-2026-88059 https://github.com/angular/angular/commit/c45028e44f5f3c1e0006eaccf86642deca51b2af https://github.com/angular/angular/commit/caf616670fd20d528aa69e0131cc17d60f0cc27d https://github.com/angular/angular/commit/e4c416c20a1cb222ce73d29c035452b257380c56 https://github.com/angular/angular/issues/69777 https://github.com/angular/angular/pull/69778 https://github.com/angular/angular/releases/tag/v20.3.28 https://github.com/angular/angular/releases/tag/v21.2.20 https://github.com/angular/angular/releases/tag/v22.1.1 https://github.com/angular/angular/security/advisories/GHSA-p297-fm68-3q8c