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CVE-2026-54267— Angular Client Hydration DOM Clobbering & Response-Cache Poisoning

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Angular组织开源的一个开发平台。用于使用 Typescript / JavaScript 和其他语言构建移动和桌面 Web 应用程序。 Angular存在安全漏洞，该漏洞源于DOM Clobbering问题，由于状态容器查找可预测且仅依赖ID选择器（ng-state），若应用在浏览器解析真实<script>标签前绑定不可信用户输入或CMS内容到元素属性（如id），可能导致攻击者控制的元素在DOM查找中优先被使用，随后Angular在 hydration 过程中尝试解析其文本内容或属性

AI Predicted 6.5 Difficulty: Moderate EPSS 0.32% · P22

Affected Version Matrix 4

VendorProduct Version RangeStatus
angular angular >= 22.0.0-next.0 < 22.0.1 affected
>= 21.0.0-next.0 < 21.2.17 affected
>= 20.0.0-next.0 < 20.3.25 affected
<= 19.2.25 affected
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I. Basic Information for CVE-2026-54267

Vulnerability Information
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Vulnerability Title
Angular Client Hydration DOM Clobbering & Response-Cache Poisoning
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 22.0.1, 21.2.17, and 20.3.25, to optimize client-side bootstrap in Server-Side Rendered (SSR) environments, Angular supports Hydration via provideClientHydration(). During SSR, Angular serializes the application's runtime state (such as cached HttpClient responses) and outputs it into the HTML stream as a <script> tag with a predictable identifier. During client bootstrap, Angular recovers this state by looking up the element via document.getElementById('ng-state') and parsing its text content. Because the DOM element lookup for the state container is predictable and relies solely on the ID selector (ng-state), it is susceptible to DOM Clobbering. If the application binds untrusted user input or CMS content to element properties such as id (e.g., <div [id]="userInput"> or <a id="ng-state">) before the genuine <script> tag is parsed by the browser, the attacker-controlled element takes precedence in the DOM lookup. During hydration, when Angular calls document.getElementById('ng-state'), the browser returns the attacker's clobbered element. Angular then attempts to parse the text content or attributes of this clobbered element as JSON. This vulnerability is fixed in 22.0.1, 21.2.17, and 20.3.25.
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
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Angular 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Angular是Angular组织开源的一个开发平台。用于使用 Typescript / JavaScript 和其他语言构建移动和桌面 Web 应用程序。 Angular存在安全漏洞，该漏洞源于DOM Clobbering问题，由于状态容器查找可预测且仅依赖ID选择器（ng-state），若应用在浏览器解析真实<script>标签前绑定不可信用户输入或CMS内容到元素属性（如id），可能导致攻击者控制的元素在DOM查找中优先被使用，随后Angular在 hydration 过程中尝试解析其文本内容或属性
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
angular angular >= 22.0.0-next.0 < 22.0.1 -

II. Public POCs for CVE-2026-54267

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III. Intelligence Information for CVE-2026-54267

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Patches & Fixes for CVE-2026-54267 (2)

Vendor Advisories for CVE-2026-54267 (1)

Same Patch Batch · angular · 2026-06-22 · 17 CVEs total

CVE-2026-52725 Angular Template and Dynamic Component Namespace Bypass leading to Cross-Site Scripting (X
CVE-2026-54265 Angular: Two-Way Property Binding Sanitization Bypass (XSS)
CVE-2026-54268 Angular: Denial of Service (DoS) via OOM in Date Formatting (formatDate)
CVE-2026-54266 Angular: Weak 32-Bit Cache Key Hashing in `HttpTransferCache` Leading to Cross-Request Dat
CVE-2026-54264 Angular: Sensitive Header Leakage on Cross-Origin Redirects in Angular Service Worker
CVE-2026-49241 Angular: Multiple Remote Code Execution Vulnerabilities in Angular Language Service VS Cod
CVE-2026-50171 Angular: Denial of Service (DoS) via OOM in Number Formatting (digitsInfo)
CVE-2026-50169 Angular Service Worker Policy-Bypass & Credential-Stripping Vulnerabilities
CVE-2026-50557 Angular: Template and Attribute Namespace Sanitization Bypass (XSS)
CVE-2026-50168 Angular: URL Parser Differential in @angular/platform-server leading to SSRF Allowlist Byp
CVE-2026-50556 Angular: Missing `<noscript>` Raw-Text Serialization Escaping leads to Cross-Site Scriptin
CVE-2026-50555 Angular: Improper Neutralization of Input During Web Page Generation ('Cross-site Scriptin
CVE-2026-50184 Angular: Request Credential & Cache Policy Stripping in Angular Service Worker
CVE-2026-50170 Angular: Information Leak via Default Caching of Credentialed Requests in HttpTransferCach
CVE-2026-50178 Angular: Remote Code Execution via JSDoc Hover Command Injection in VS Code Angular Langua
CVE-2026-46417 Angular: SSRF via Hostname Hijacking in @angular/platform-server

IV. Related Vulnerabilities

Same product: angular
Same vendor: angular
Same weakness: CWE-79

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