{"id":"CVE-2026-113103","title":"chromium-browser: chromium-browser: arbitrary code execution in WebProtect via crafted HTML page (CVE-2026-113103)","summary":"A flaw was found in chromium-browser. A remote attacker can exploit a use-after-free vulnerability, where released memory is improperly accessed, in the WebProtect component to achieve arbitrary code execution inside the browser sandbox. T…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-416"],"vendor":"Red Hat","product":"Chrome","affected":["Chrome >= 156.0.8078.47 < 156.0.8078.47"],"published":"2026-10-20","updated":"2026-10-21","sourceUpdated":"2026-10-21T01:32:32+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-113103.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-113103.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-113103"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-113103"},{"url":"https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html"},{"url":"https://issues.chromium.org/issues/500474551"}],"tags":["csaf","vex","red-hat","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-20T22:55:59.045693Z"},"ingestedAt":"2026-10-20T21:19:21.171Z","epss":0.00528,"epssPercentile":0.44479,"slug":"CVE-2026-113103","body":"## Overview\n\nA flaw was found in chromium-browser. A remote attacker can exploit a use-after-free vulnerability, where released memory is improperly accessed, in the WebProtect component to achieve arbitrary code execution inside the browser sandbox. To exploit this issue, an attacker must trick a user into visiting a specially crafted HTML page. Successful exploitation allows the attacker to execute unauthorized instructions within the restricted sandbox environment.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-113103.json)\n\n**chromium-browser: chromium-browser: arbitrary code execution in WebProtect via crafted HTML page**. Released 2026-10-20, updated 2026-10-21.\n\nNot affected:\n\n- All currently supported Red Hat products\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":226419,"id":"CVE-2026-113103","ts":1792539300333,"field":"cvss","old":null,"new":"8.8"},{"seq":226418,"id":"CVE-2026-113103","ts":1792539300333,"field":"severity","old":"none","new":"high"}]}