{"id":"CVE-2026-79136","title":"chromium-browser: Chromium: Web origin policy bypass via incorrect ServiceWorker authorization (CVE-2026-79136)","summary":"A flaw was found in Chromium. This incorrect authorization vulnerability in the ServiceWorker component allows a remote attacker to bypass the web origin policy. By crafting a malicious HTML page, an attacker can circumvent security restri…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cvssSource":"vendor","cwe":["CWE-863"],"vendor":"Red Hat","product":"Chrome","affected":["Chrome >= 152.0.7977.65 < 152.0.7977.65"],"published":"2026-08-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T04:49:36+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79136.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79136.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-79136"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-79136"},{"url":"https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html"},{"url":"https://issues.chromium.org/issues/503624894"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00345,"epssPercentile":0.27916,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-27T19:39:09.227575Z"},"scores":{"vendor":5.4,"adp":4.3},"ingestedAt":"2026-09-17T23:31:20.811Z","slug":"CVE-2026-79136","body":"## Overview\n\nA flaw was found in Chromium. This incorrect authorization vulnerability in the ServiceWorker component allows a remote attacker to bypass the web origin policy. By crafting a malicious HTML page, an attacker can circumvent security restrictions, potentially leading to unauthorized access to sensitive information or other security impacts.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79136.json)\n\n**chromium-browser: Chromium: Web origin policy bypass via incorrect ServiceWorker authorization**. Released 2026-08-25, updated 2026-09-25.\n\nNot affected:\n\n- All currently supported Red Hat products\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":210660,"id":"CVE-2026-79136","ts":1790322144808,"field":"cvss","old":"4.3","new":"5.4"}]}