CVE-2026-3155: Onesignal – Web Push Notifications

Low severity, CVSS 3.1. EPSS: 0.3% chance of exploitation in the next 30 days.

The OneSignal – Web Push Notifications plugin for WordPress is vulnerable to authorization bypass in versions up to, and including, 3.8.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete OneSignal metadata for arbitrary posts.

Affected products

• Onesignal Onesignal – Web Push Notifications: up to and including 3.8.0

Published 2026-04-16. Last modified 2026-06-17.