CVE-2026-101897

Description

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.

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Weakness Type (CWE)

CWE-346 CWE-346

CWE-441 CWE-441

CWE-940 CWE-940

References

Other References

https://github.com/angular/angular/commit/7c053599c79a6ddd785a9bae33ff9fc7b355ea0d https://github.com/angular/angular/commit/cf492e8a372e2bbddb84987df12c33a52c23c72f https://github.com/angular/angular/commit/e02c4d89bcf5da9af499e0dfbba8c29206976ab3 https://github.com/angular/angular/pull/70623 https://github.com/angular/angular/security/advisories/GHSA-r653-wxfp-pp9c

Frequently Asked Questions

What is CVE-2026-101897? +

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.

How do I check if I'm vulnerable to CVE-2026-101897? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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