CVE-2026-19986: Improper Authorization in Adblock for Youtube Extension
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.
AI Analysis
Technical Summary
The vulnerability CVE-2026-19986 affects the Adblock for Youtube Extension up to versions 7.2.0 and 7.2.1 on Chrome. It involves improper authorization in the updateDynamicRules function of contentscript.js, specifically related to the manipulation of the yt-anti-adblock-detected argument in the Event Listener component. This flaw allows remote attackers to exploit the extension's functionality without proper authorization. Public exploit code has been released, increasing the risk of exploitation. The vendor has not issued any response or patch for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows remote attackers to bypass authorization controls in the Adblock for Youtube Extension, potentially enabling unauthorized manipulation of dynamic rules within the extension. This could undermine the extension's intended functionality and user security. However, there is no indication of privilege escalation or direct system compromise. The CVSS 4.0 base score is 5.3, indicating a medium impact.
Mitigation Recommendations
No official patch or remediation is currently available from the vendor, who has not responded to the disclosure. Users should consider disabling or uninstalling the affected versions (7.2.0 and 7.2.1) of the Adblock for Youtube Extension until a fix is released. Monitoring for vendor updates or alternative extensions with similar functionality is recommended.
CVE-2026-19986: Improper Authorization in Adblock for Youtube Extension
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 v4.0
Score 5.3medium
Affected software
Adblock for Youtube Extension
cpe:2.3:a:adblock_for_youtube_extension:adblock_for_youtube_extension:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-19986 affects the Adblock for Youtube Extension up to versions 7.2.0 and 7.2.1 on Chrome. It involves improper authorization in the updateDynamicRules function of contentscript.js, specifically related to the manipulation of the yt-anti-adblock-detected argument in the Event Listener component. This flaw allows remote attackers to exploit the extension's functionality without proper authorization. Public exploit code has been released, increasing the risk of exploitation. The vendor has not issued any response or patch for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows remote attackers to bypass authorization controls in the Adblock for Youtube Extension, potentially enabling unauthorized manipulation of dynamic rules within the extension. This could undermine the extension's intended functionality and user security. However, there is no indication of privilege escalation or direct system compromise. The CVSS 4.0 base score is 5.3, indicating a medium impact.
Mitigation Recommendations
No official patch or remediation is currently available from the vendor, who has not responded to the disclosure. Users should consider disabling or uninstalling the affected versions (7.2.0 and 7.2.1) of the Adblock for Youtube Extension until a fix is released. Monitoring for vendor updates or alternative extensions with similar functionality is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-16T14:32:39.184Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a829838bf8831d539471bee
Added to database: 08/17/2026, 05:12:24 UTC
Last enriched: 08/24/2026, 12:44:58 UTC
Last updated: 10/01/2026, 14:51:04 UTC
Views: 70
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