CVE-2026-48748: Netty

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

Netty is a network application framework for development of protocol servers and clients. Starting in version 4.2.0.Final and prior to version 4.2.15.Final, a memory exhaustion vulnerability in the Netty HTTP/3 codec allows the creation of an infinite number of blocked streams, which can cause OOM error. Version 4.2.15.Final patches the issue.

Affected products

• Netty Netty: from 4.2.0, before 4.2.15 (fixed in 4.2.15)

Published 2026-06-12. Last modified 2026-08-04.