{"id":"CVE-2026-121156","published":"2026-11-03T21:17:23.283","lastModified":"2026-11-04T05:18:35.067","description":"Buffer overflow in Dawn in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)","cvssScore":9.6,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cwes":["CWE-122"],"vendors":[],"products":[],"references":[{"url":"https://chromereleases.googleblog.com/2026/11/stable-channel-update-for-desktop.html","tags":[]},{"url":"https://issues.chromium.org/issues/567735302","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A heap-based buffer overflow in Google Chrome's Dawn graphics library prior to version 157.0.8103.38 allowed remote attackers to execute arbitrary code outside the sandbox by tricking a user into visiting a malicious HTML page.","exploitability":"Exploitation requires user interaction (e.g., clicking a link or visiting a crafted webpage) and precise memory corruption conditions, making it non-trivial but feasible for skilled attackers.","blast_radius":"Successful exploitation could lead to full system compromise outside Chrome's sandbox, enabling data theft, malware installation, or lateral movement within the host.","remediation":"Upgrade Google Chrome to version 157.0.8103.38 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["buffer-overflow","rce","sandbox-escape","web","chrome","dawn"],"model":"garnet-coder","analyzedAt":"2026-11-04T09:51:48.840Z"}}