CVE-2026-17920 Use after free in Chrome
An attacker can execute arbitrary code inside the sandbox by tricking a user into installing a malicious Chrome extension exploiting a V8 use-after-free bug.
- 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
- Available
What is CVE-2026-17920?
CVE-2026-17920 is a high-severity use after free vulnerability in Google Chrome, published on 30 Jul 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
Use after free in V8 in Google Chrome prior to 151.0.7922.72 allowed an attacker who convinced a user to install a malicious extension to execute arbitrary code inside a sandbox via a crafted Chrome Extension. (Chromium security severity: Low)
Weakness: CWE-416
Which versions are affected by CVE-2026-17920?
It affects 1 product.
Products include Google Chrome.
How do I fix CVE-2026-17920?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-17920 being exploited?
There is no known exploitation of CVE-2026-17920 in the wild and no public exploit code.
Other vulnerabilities in Google Chrome
Sources
Also known as DEBIAN-CVE-2026-17920, ECHO-f9fc-5e18-c7b2, GHSA-q3m4-5gjc-6gmv, MINI-2q4v-5m2r-f328.