CVE-2026-17681 is a high-severity vulnerability in Google Chrome on Android affecting versions prior to 151.0.7922.72. The flaw stems from insufficient validation of untrusted input in the Web Authentication component. A remote attacker who has already compromised the renderer process could exploit this vulnerability to perform a sandbox escape. The attack vector requires a crafted HTML page to trigger the vulnerability. Google has assigned this a 'High' severity rating under the Chromium security severity scale. A fix has been issued in Chrome stable channel version 151.0.7922.72. Users on Android are advised to update immediately to mitigate the risk of sandbox escapes following renderer compromise.