CVE-2026-88059
Vulnérabilité moyenne dans angular (angular)
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.
Gravité et risque d'exploitation
CVE-2026-88059 obtient un score CVSS de 4.0/10, soit une gravité moyenne. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.34 %, ce qui la place devant 25.8 % des CVE référencées.
Que faire ?
- Vérifiez si angular (versions <= 19.2.25, >= 20.0.0, < 20.3.28, >= 22.0.0, < 22.1.1, >= 21.0.0, < 21.2.20) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://github.com/angular/angular/security/advisories/GHSA-p297-fm68-3q8c
- https://github.com/angular/angular/issues/69777
- https://github.com/angular/angular/pull/69778
- 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/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
