Executive brief
Netty is a popular networking library used in many Java-based applications and services. A flaw in its STOMP (Streaming Text Oriented Messaging Protocol) codec allows an attacker to send a malicious message that triggers an infinite processing loop, consuming all available memory and CPU resources and crashing the affected service. This can disrupt business operations for any application relying on STOMP messaging.
Technical details
The vulnerability is an integer truncation flaw in the Netty STOMP codec. An attacker can send a specially crafted STOMP frame with a content-length header value exceeding the maximum integer value, causing the codec to enter an infinite decode loop. The attack requires network access to the STOMP service endpoint but no authentication or user interaction. Successful exploitation results in a Denial of Service (DoS) condition, exhausting memory and CPU resources on the affected host. Patches are expected from the Netty project.
Affected products
- Netty Netty <UNKNOWN>
Timeline
- 2026-09-18: disclosed