CVE-2026-7686: eyeo Adblock Plus · CWE-266
Source GCVE Database
Public exploit available · CVSS 6.9 Medium.
Data as of 27 Oct 2026, 00:07 UTC
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:PExploitation evidence
Disclosed: evidence found.
CVE published 3 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| eyeoAdblock Plus | Affected
| Fixed in– |
Description
A vulnerability was found in eyeo Adblock Plus up to 4.36.2 on Chrome. Affected by this vulnerability is the function postMessage of the file premium.preload.js of the component Legacy Premium Activation. Performing a manipulation results in improper access controls. Remote exploitation of the attack is possible. The exploit has been made public and could be used. Upgrading the affected component is recommended. The vendor provides additional details: "The affected code path is a legacy Premium activation flow that has been deprecated. eyeo has already migrated to a new user account-based licensing system. The exploit does not grant permanent Premium access. The licensing server issues a short-lived trial license (valid for approximately 24 hours) for any submitted userId. On the next license check, the server validates against a real subscription and the trial expires if no valid subscription is found. The researcher's claim of permanently unlocking all Premium features is therefore incorrect. (...) The old flow has been present for years and has not been weaponized at scale to our knowledge. The risk to eyeo and to users is minimal."
References
- nvd.nist.gov/vuln/detail/CVE-2026-7686 (opens in a new tab)
- adblockplus.org/en/download (opens in a new tab)
- github.com/xryj920/CVE/blob/main/adblock_plus_CVE_report.md (opens in a new tab)
- vuldb.com/submit/793551 (opens in a new tab)
- vuldb.com/vuln/360856 (opens in a new tab)
- vuldb.com/vuln/360856/cti (opens in a new tab)