Angular: Information Leak via `HttpTransferCache` Bypass When Using `withRequestsMadeViaParent`
Summary
| CVE | CVE-2026-88059 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-10 19:17:41 UTC |
| Updated | 2026-09-10 19:44:21 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 4 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Problem Types: CWE-200 | CWE-524 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-524 CWE-524: Use of Cache Containing Sensitive Information
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 4 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N |
| 3.1 | CNA | DECLARED | 4 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/angular/angular/releases/tag/v21.2.20 | [email protected] | github.com | |
| github.com/angular/angular/pull/69778 | [email protected] | github.com | |
| github.com/angular/angular/releases/tag/v20.3.28 | [email protected] | github.com | |
| github.com/angular/angular/commit/caf616670fd20d528aa69e0131cc17d60f0cc27d | [email protected] | github.com | |
| github.com/angular/angular/commit/e4c416c20a1cb222ce73d29c035452b257380c56 | [email protected] | github.com | |
| github.com/angular/angular/issues/69777 | [email protected] | github.com | |
| github.com/angular/angular/commit/c45028e44f5f3c1e0006eaccf86642deca51b2af | [email protected] | github.com | |
| github.com/angular/angular/security/advisories/GHSA-p297-fm68-3q8c | [email protected] | github.com | |
| github.com/angular/angular/releases/tag/v22.1.1 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.