---
id: CVE-2026-101897
title: >-
  Angular is a development platform for building mobile and desktop web
  applications using TypeScript/JavaScript and other languages
summary: >-
  Angular is a development platform for building mobile and desktop web
  applications using TypeScript/JavaScript and other languages. From 1.20.0
  until 1.21.1, the Angular DevTools background service worker accepts
  chrome.runtime.sendMessa…
severity: none
cwe:
  - CWE-346
  - CWE-441
  - CWE-940
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:17:29.430'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101897'
references:
  - url: >-
      https://github.com/angular/angular/commit/7c053599c79a6ddd785a9bae33ff9fc7b355ea0d
    label: security-advisories@github.com
  - url: >-
      https://github.com/angular/angular/commit/cf492e8a372e2bbddb84987df12c33a52c23c72f
    label: security-advisories@github.com
  - url: >-
      https://github.com/angular/angular/commit/e02c4d89bcf5da9af499e0dfbba8c29206976ab3
    label: security-advisories@github.com
  - url: 'https://github.com/angular/angular/pull/70623'
    label: security-advisories@github.com
  - url: 'https://github.com/angular/angular/security/advisories/GHSA-r653-wxfp-pp9c'
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-14T16:40:32.110Z'
---

## Overview

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. From 1.20.0 until 1.21.1, the Angular DevTools background service worker accepts chrome.runtime.sendMessage runtime messages from untrusted web pages or third-party content scripts without adequately verifying the message source. An untrusted sender that obtains a valid randomized victim tabId can direct the extension to use chrome.debugger to attach to another browser tab and trigger Chrome DevTools Protocol breakpoints. This can display the debugging banner, pause JavaScript execution, and prevent interaction with the target tab, but it does not provide remote code execution, privilege escalation, or cross-origin access to memory or credentials. This issue is fixed in version 1.21.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.