CVE-2026-19986: Improper Authorization in Adblock for Youtube Extension
CVE-2026-19986 is a medium severity vulnerability in the Adblock for Youtube Extension for Chrome, versions 7.2.0 and 7.2.1. It involves improper authorization in the updateDynamicRules function of contentscript.js, triggered by manipulation of the yt-anti-adblock-detected argument. The vulnerability can be exploited remotely and public exploit code is available. The vendor has not responded or provided a patch.
AI Analysis
Technical Summary
This vulnerability affects the Adblock for Youtube Extension up to version 7.2.1 on Chrome. The issue lies in the updateDynamicRules function within contentscript.js, specifically in the Event Listener component. Improper authorization occurs due to manipulation of the argument yt-anti-adblock-detected, allowing remote attackers to exploit the extension. Public exploit code exists, but no official remediation or patch has been provided by the vendor.
Potential Impact
Successful exploitation could allow remote attackers to bypass authorization controls within the extension, potentially altering its behavior or rules dynamically. This could undermine the extension's intended functionality and user security. However, there is no indication of privilege escalation beyond the extension context or direct system compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch is available, 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.
CVE-2026-19986: Improper Authorization in Adblock for Youtube Extension
Description
CVE-2026-19986 is a medium severity vulnerability in the Adblock for Youtube Extension for Chrome, versions 7.2.0 and 7.2.1. It involves improper authorization in the updateDynamicRules function of contentscript.js, triggered by manipulation of the yt-anti-adblock-detected argument. The vulnerability can be exploited remotely and public exploit code is available. The vendor has not responded or provided a patch.
CVSS v4.0
Score 5.3medium
Affected software
cpe:2.3:a:adblock_for_youtube_extension:adblock_for_youtube_extension:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Adblock for Youtube Extension up to version 7.2.1 on Chrome. The issue lies in the updateDynamicRules function within contentscript.js, specifically in the Event Listener component. Improper authorization occurs due to manipulation of the argument yt-anti-adblock-detected, allowing remote attackers to exploit the extension. Public exploit code exists, but no official remediation or patch has been provided by the vendor.
Potential Impact
Successful exploitation could allow remote attackers to bypass authorization controls within the extension, potentially altering its behavior or rules dynamically. This could undermine the extension's intended functionality and user security. However, there is no indication of privilege escalation beyond the extension context or direct system compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch is available, 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.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-16T14:32:39.184Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a829838bf8831d539471bee
Added to database: 08/17/2026, 05:12:24 UTC
Last enriched: 08/17/2026, 05:29:32 UTC
Last updated: 08/17/2026, 06:11:05 UTC
Views: 6
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