CVE-2026-3910

Think of your browser sandbox like a locked room meant to keep malicious actions from escaping. This bug is a way for a crafted web page to slip malicious instructions into that room and run attacker code. If it hits, it can turn a normal browsing session into a foothold for stealing data or doing further damage.

This matters if your small business computers use Google Chrome (and Microsoft Edge) on a version older than 146.0.7680.75. Because the attacker only needs to send a victim a malicious HTML page, you don’t need special logins or special admin access for the initial step—users just have to open the page. It is a risk on any device where the browser version is still unpatched, and it’s reachable through normal web browsing.

This is RED because it is included in CISA’s KEV list, meaning it has reached the level of confirmed real-world risk that warrants a set remediation deadline. Even without a public exploit drop, the bug is reachable from the network and triggered by a crafted web page, so normal browsing can expose users if browsers aren’t updated by the due date.