CVE-2026-102599 | Engine.IO up to 6.6.9 Transport Upgrade EIO denial of service

September 30, 2026 Yanac

A vulnerability classified as problematic has been found in Engine.IO up to 6.6.9. Affected by this vulnerability is an unknown functionality of the component Transport Upgrade. The manipulation of the argument EIO leads to denial of service.

This vulnerability is documented as CVE-2026-102599. The attack can be initiated remotely. There is not any exploit available.

It is recommended to upgrade the affected component.VulDB Recent EntriesRead More