CVE-2026-19986

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 v3 5.4 MEDIUM
CVSS v2.0 6.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

6.4^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:P

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
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
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-17 05:17

Updated : 2026-08-20 12:48

NVD link : CVE-2026-19986

Mitre link : CVE-2026-19986

CVE.ORG link : CVE-2026-19986

JSON object : View

Products Affected

No product.

CWE

CWE-266

Incorrect Privilege Assignment

CWE-285

Improper Authorization

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