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CVE-2026-50178— Angular: Remote Code Execution via JSDoc Hover Command Injection in VS Code Angular Language Service Extension

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 21.2.4之前版本和Angular.ng-template 21.2.4之前版本存在安全漏洞，该漏洞源于未对JSDoc字符串中的括号、原始链接和控制字符进行清理或转义，可能导致开发者悬停于恶意符号并点击链接后执行命令。

AI Predicted 7.8 Difficulty: Easy EPSS 0.50% · P41

Affected Version Matrix 2

VendorProduct Version RangeStatus
angular angular < 21.2.4 affected
angular Angular.ng-template < 21.2.4 affected
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I. Basic Information for CVE-2026-50178

Vulnerability Information
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Vulnerability Title
Angular: Remote Code Execution via JSDoc Hover Command Injection in VS Code Angular Language Service Extension
Source: CVE Program / CVE List V5
Vulnerability Description
The Angular Language Service VS Code Extension provides a rich editing experience for Angular templates. the client-side Angular Language Service VS Code extension configures the tooltip Markdown renderer with the isTrusted: true option (located in client/src/client.ts). This setting instructs VS Code to trust all rendered content it receives, which enables active elements such as command: URIs. However, the background Angular Language Server process fails to escape or sanitize brackets, raw links, and control characters from JSDoc strings before forwarding the hover Markdown content (located in server/src/handlers/hover.ts and server/src/text_render.ts). An attacker can leverage this behavior by crafting a project TypeScript or JavaScript file (or a third-party npm package dependency) containing a malicious JSDoc tooltip with an embedded active command link. When a developer hovers over the target symbol to render the tooltip and clicks the malicious link, the IDE executes the command sequence directly on the developer's host machine. Prior to 21.2.4, This vulnerability is fixed in 21.2.4.
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:H/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 跨站脚本漏洞
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 21.2.4之前版本和Angular.ng-template 21.2.4之前版本存在安全漏洞，该漏洞源于未对JSDoc字符串中的括号、原始链接和控制字符进行清理或转义，可能导致开发者悬停于恶意符号并点击链接后执行命令。
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 < 21.2.4 -
angular Angular.ng-template < 21.2.4 -

II. Public POCs for CVE-2026-50178

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III. Intelligence Information for CVE-2026-50178

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Vendor Advisories for CVE-2026-50178 (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-2026-54267 Angular Client Hydration DOM Clobbering & Response-Cache Poisoning
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-2026-46417 Angular: SSRF via Hostname Hijacking in @angular/platform-server

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-50178

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