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Vulnerability · Published Sep 10, 2026 · Assigned by GitHub_M

CVE-2026-88056Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR

High 8.6

In plain English

A high-severity server-side request forgery in angular from angular. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.6High
Exploit odds (30 days)0.5%top 54.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12angular.jsno fix listedDEBIAN-CVE-2026-88056
Debian:13angular.jsno fix listedDEBIAN-CVE-2026-88056
Ubuntu:22.04:LTSangular.jsno fix listedUBUNTU-CVE-2026-88056
Ubuntu:24.04:LTSangular.jsno fix listedUBUNTU-CVE-2026-88056
Ubuntu:26.04:LTSangular.jsno fix listedUBUNTU-CVE-2026-88056
Ubuntu:26.10angular.jsno fix listedUBUNTU-CVE-2026-88056
npm@angular/platform-serverno fix listedGHSA-f6mr-pjwc-34m4
npm@angular/platform-server20.3.30GHSA-f6mr-pjwc-34m4
npm@angular/platform-server22.1.4GHSA-f6mr-pjwc-34m4
npm@angular/platform-server21.2.22GHSA-f6mr-pjwc-34m4

Affected products (as reported)

VendorProductVersions
angular angular <= 19.2.25>= 20.0.0, < 20.3.30>= 21.0.0, < 21.2.22>= 22.0.0, < 22.1.4

Weakness: CWE-918 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References