CVE-2026-101897 Angular DevTools (Local DoS)
An attacker can cause a local denial of service in browser tabs by exploiting insufficient message source verification in the Angular DevTools extension.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-101897?
CVE-2026-101897 is a medium-severity denial of service vulnerability in angular DevTools, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-101897?
How do I fix CVE-2026-101897?
No fix has been published for CVE-2026-101897 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-101897 being exploited?
There is no known exploitation of CVE-2026-101897 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-101897, GHSA-r653-wxfp-pp9c.