Use after free in Shared Tab Groups in Google Chrome on on Android prior to 152.0.7977.75 allowed a remote attacker leveraging social engineering to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

CVE-2026-84353 is a critical use-after-free vulnerability in the Shared Tab Groups feature of Google Chrome on Android. Versions prior to 152.0.7977.75 are affected. A remote attacker can exploit this vulnerability through social engineering, tricking a user into visiting a crafted HTML page. Successful exploitation allows arbitrary code execution outside the browser sandbox, representing a full sandbox escape. The vulnerability has been assigned a Critical severity rating by the Chromium security team. Users are urged to update to Chrome 152.0.7977.75 or later on Android immediately.