CVE-2026-82809 vidIQ Vision for YouTube Extension postMessage window.addEventListener information disclosure
Remote attackers can exploit a postMessage handler flaw in the vidIQ Vision extension to disclose sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-82809?
CVE-2026-82809 is a medium-severity vulnerability in vidIQ Vision for YouTube Extension, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A security flaw has been discovered in vidIQ Vision for YouTube Extension 3.199.0 on Chrome. The affected element is the function window.addEventListener of the component postMessage Handler. Performing a manipulation of the argument vidiqEvent results in information disclosure. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor explains: "At this time, vidIQ does not accept security vulnerability submissions, and we do not have a bug bounty program in place."
Which versions are affected by CVE-2026-82809?
How do I fix CVE-2026-82809?
No fix has been published for CVE-2026-82809 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82809 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82809 exists.
Sources
Also known as GHSA-g6rc-gmfp-482p.