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. This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.

Scores

EPSS (exploitation in 30 days)

0.43% · top 63% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.

Weakness

• CWE-524: Use of Cache Containing Sensitive Information (opens in a new tab)All about CWE-524 and its CVEs

Affected products

• angular · angular

  • affected >= 22.0.0-next.0, < 22.0.0-rc.2
  • affected >= 21.0.0-next.0, < 21.2.15
  • affected >= 20.0.0-next.0, < 20.3.22
  • affected >= 19.0.0-next.0, < 19.2.23
  • affected <= 18.2.14

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• npm@angular/commonGHSA-q6f4-qqrg-jv6x (opens in a new tab)

References (2)

• https://github.com/angular/angular/security/advisories/GHSA-q6f4-qqrg-jv6x (opens in a new tab)x_refsource_CONFIRM
• https://github.com/angular/angular/pull/67964 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-q6f4-qqrg-jv6x (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-50170](https://trackcve.app/badge/CVE-2026-50170.svg)](https://trackcve.app/cve/CVE-2026-50170)

Record last updated 23 Jun 2026, 16:00 UTC.