CVE-2026-19986 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-19986LOW

n/a Adblock for Youtube Extension — Adblock for Youtube Extension Event Listener contentscript.js updateDynamicRules improper authorization

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   P   N   L   L    2.1   .0024   15.7     —

AFFECTED
  Product                        Versions  Fixed
  Adblock for Youtube Extension  7.2.0 –   —

TIMELINE
  Aug 16  EXPLOIT PUBLISHED — CVE-2026-19986 (Adblock for Youtube Extension). Public exploit reference added.
  Aug 16  Reserved by VulDB
  Aug 17  Published (CNA: VulDB)

CWE-285, CWE-266 · CNA: VulDB · CVSS v4.0 · 5 references · NVD status: Received

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-19986 (Adblock for Youtube Extension). Public exploit reference added.
August 16, 2026	Reserved	Reserved by VulDB
August 17, 2026	Published	Published (CNA: VulDB)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	Adblock for Youtube Extension	—	7.2.0	—

Weaknesses

CWE-285 · CWE-266

References (5)

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 [exploit, media-coverage]
https://vuldb.com/cve/CVE-2026-19986 [third-party-advisory]
https://vuldb.com/submit/873935 [third-party-advisory]
https://vuldb.com/vuln/391190 [vdb-entry, technical-description]
https://vuldb.com/vuln/391190/cti [signature, permissions-required]

Authoritative record: CVE-2026-19986 at cve.org

Weaknesses: CWE-285 · CWE-266

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-19986 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.