{"id":"CVE-2026-19986","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-19986","generatedAt":"2026-10-28T04:03:56.580Z","title":"A weakness has been identified in Adblock for Youtube Extension up to 7.2.1 on Chrome.","description":"A weakness has been identified in Adblock for Youtube Extension up to 7.2.1 on Chrome. The impacted element is the function updateDynamicRules of the file contentscript.js of the component Event Listener. This manipulation of the argument yt-anti-adblock-detected causes improper authorization. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.","published":"2026-08-17T05:17:10.000Z","lastModified":"2026-08-20T12:48:10.000Z","status":"Deferred","sourceIdentifier":"cna@vuldb.com","cvss":{"version":"4.0","score":2.1,"severity":"LOW","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-266","CWE-285"],"affected":[],"epss":{"score":0.00418,"percentile":0.35942,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.42%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/xryj920/chrome_extensions/blob/main/AdBlock%20Ltd.%20Adblock%20for%20Youtube%207.2.1%20allows%20persistent%20disabling%20of%20ad%20blocking%20through%20an%20unauthenticated%20DOM%20event","source":"cna@vuldb.com"},{"url":"https://vuldb.com/cve/CVE-2026-19986","source":"cna@vuldb.com"},{"url":"https://vuldb.com/submit/873935","source":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/391190","source":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/391190/cti","source":"cna@vuldb.com"},{"url":"https://vuldb.com/submit/873935","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-19986","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}