CVE-2026-48748

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.

Score

CVSS 3.1 7.5 High

Status

Modified - security-advisories@github.com

Published

2026-06-12

Last modified

2026-08-04

Weaknesses

CWE-770

Affected products

• Netty (Netty)
• Apache Camel Hawtio (Redhat)

References

• https://github.com/netty/netty/commit/75127cab731ee35068d1f0667bffa188bc332f5d
• https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
• https://github.com/netty/netty/security/advisories/GHSA-4grm-h2qv-h6w6
• https://access.redhat.com/security/cve/CVE-2026-48748
• https://bugzilla.redhat.com/show_bug.cgi?id=2488441
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48748.json