CVE-2026-19986Disclosure

LOWCVSS 2.1 · LOW

Signal is active with 3 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-266CWE-285

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 3 mentions across 1 observed day

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • 3 total mentions across 1 day

Deep dive

Activity timeline3 mentions / 1d
01223Mentions · 2026-08-17: 3Technical Details · 2026-08-17: 308-17
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Full discourse3 posts
  • CVE@CVEnew
    Disclosure

    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 contentscri… https://www.cve.org/CVERecord?id=CVE-2026-19986

    Post summary

    A new weakness in the Adblock for Youtube Chrome extension (v7.2.1) has been reported, affecting the updateDynamicRules function, but no PoC, exploit, or patch is disclosed.

    010001.1K
    58.0K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* 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 contentscri… https://www.cve.org/CVERecord?id=CVE-2026-19986 ----- Traducción: CVE-2026-19986 Se … https://infoflow.cloud`

    Post summary

    A weakness in Adblock for Youtube Extension v7.2.1 affecting the updateDynamicRules function has been disclosed; no PoC, exploit, patch, or active exploitation claims are present.

    0000050
    100 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-19986 Improper Authorization in Adblock for Youtube Extension Up To 7.2.1 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-19986

    Post summary

    The entry announces CVE-2026-19986 as an improper‑authorization flaw in the Adblock for Youtube extension (up to version 7.2.1), with no PoC, exploit details, or patch information provided.

    0000099
    4.1K followersView on X

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