Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/xryj920/chrome_extensions/blob/main/AdBlock%20Ltd.%20Adblock%
- https://vuldb.com/cve/CVE-2026-19986
- https://vuldb.com/submit/873935
- https://vuldb.com/vuln/391190
- https://vuldb.com/vuln/391190/cti
- https://vuldb.com/submit/873935
FAQ
What is CVE-2026-19986?
CVE-2026-19986 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 Liste...
How severe is CVE-2026-19986?
CVE-2026-19986 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-19986?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.