Resource exhaustion in Netty - CVE-2026-47244
Published: June 8, 2026
Vulnerability identifier: #VU133445
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-47244
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Netty project
Affected software:
Netty
Netty
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the HTTP/2 stream management logic when handling HTTP/2 connections without an explicitly configured concurrent stream limit. A remote attacker can open a large number of streams over a single TCP connection to cause a denial of service.
The issue occurs when the application does not explicitly configure a maximum concurrent streams setting.
How to mitigate CVE-2026-47244
Install security update from vendor's website.