CVE-2026-19986

Adblock for Youtube Extension Event Listener contentscript.js updateDynamicRules improper authorization

Published Aug 17, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Adblock for Youtube Extension Event Listener contentscript.js updateDynamicRules improper authorization
First Time appeared Adblock For Youtube Extension
Adblock For Youtube Extension adblock For Youtube Extension
Weaknesses CWE-266
CWE-285
CPEs cpe:2.3:a:adblock_for_youtube_extension:adblock_for_youtube_extension:*:*:*:*:*:*:*:*
Vendors & Products Adblock For Youtube Extension
Adblock For Youtube Extension adblock For Youtube Extension
References
Metrics cvssV2_0

{'score': 6.4, 'vector': 'AV:N/AC:L/Au:N/C:N/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 5.4, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 5.3, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
Aug 19, 2026, 3:40 PM
Reserved
Aug 16, 2026, 2:32 PM
Status
Deferred
Published
Aug 17, 2026, 5:17 AM
Modified
Aug 20, 2026, 12:48 PM