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

Quick assessment

Affected
angular angular
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Angular 是一个用于构建移动端和桌面端 Web 应用的开发平台，支持 TypeScript/JavaScript 及其他编程语言。 在 20.3.30、21.2.22 和 21.1.4 之前，Angular 的服务端渲染（Server-Side Rendering，@angular/platform-server）在处理由用户控制资源 URL 或请求 URL 时，会先通过应用代码使用 WHATWG URL 解析进行验证，随后再经由 HttpClient 处理。 被调用的 和 工具函数内部调用了 ，该调用会移除

CVSS 8.6 · High

Affected Version Matrix 4

VendorProduct Version RangeStatus
angular angular <= 19.2.25 affected
>= 20.0.0, < 20.3.30 affected
>= 21.0.0, < 21.2.22 affected
>= 22.0.0, < 22.1.4 affected
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I. Basic Information for CVE-2026-88056

Vulnerability Information
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Vulnerability Title
Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
angular angular <= 19.2.25 -

II. Public POCs for CVE-2026-88056

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III. Intelligence Information for CVE-2026-88056

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Patches & Fixes for CVE-2026-88056 (3)

Vendor Advisories for CVE-2026-88056 (1)

Vendor Pages for CVE-2026-88056 (3)

Same Patch Batch · angular · 2026-09-10 · 5 CVEs total

CVE-2026-88058 8.6 HIGH Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Cont
CVE-2026-88060 8.6 HIGH Angular: SSR XSS via Unescaped <template> Content Across DocumentFragment Boundaries in Fa
CVE-2026-88057 5.3 MEDIUM Angular: Sanitization bypass via directive host bindings on concrete host elements in @ang
CVE-2026-88059 4.0 MEDIUM Angular: Information Leak via `HttpTransferCache` Bypass When Using `withRequestsMadeViaPa

IV. Related Vulnerabilities

Same product: angular
Same vendor: angular
Same weakness: CWE-918

V. Comments for CVE-2026-88056

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