CVE-2026-44891CWE-400CWE-770

Netty: Denial of Service via Unbounded Headers in StompSubframeDecoder

High · published July 17, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
53.7
In the wild
Unconfirmed
What it is

Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.stomp.StompSubframeDecoder fails to limit the total number of headers or their cumulative size per frame, and the maxLineLength parameter only restricts individual header lines. An attacker can send a large number of short headers that are accumulated in memory inside DefaultStompHeadersSubframe until the JVM throws an OutOfMemoryError, causing denial of service for servers exposing a STOMP endpoint based on StompSubframeDecoder. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00728 · 53.7th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-07-17T20:16Z
EPSS history
Timeline
  • 17 JUL 20:16Z
    Netty: Denial of Service via Unbounded Headers in StompSubframeDecoder
    cvelistv5