CVE-2026-88056

Summary

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular Server-Side Rendering in @angular/platform-server processes user-controlled resource or request URLs through HttpClient after application code validates them with WHATWG URL parsing. The resolveUrl and parseUrl utilities called String.prototype.trim(), which removed leading Unicode whitespace such as U+00A0 or U+FEFF after the input passed a same-origin check, converting a relative path into a protocol-relative attacker-controlled URL. In affected applications that attach sensitive server-side credentials such as Authorization headers to approved requests, relativeUrlsTransformerInterceptorFn then dispatched the request to the attacker-controlled origin, causing SSRF and credential disclosure. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4.

Affected Software

VendorProductVersion RangeStatus
angularangular<= 19.2.25affected
angularangular>= 20.0.0, < 20.3.30affected
angularangular>= 21.0.0, < 21.2.22affected
angularangular>= 22.0.0, < 22.1.4affected

Weaknesses

  • CWE-918: CWE-918: Server-Side Request Forgery (SSRF)

References