# CVE-2026-93560: Netty STOMP codec integer truncation denial of service

Source: https://junglewise.ai/threats/cve-2026-93560-netty-stomp-codec-integer-truncation-denial-of-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-93560 · Severity: high · CVSS 7.5 · Published 2026-09-18

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.

Technologies: [Netty](https://junglewise.ai/threats/technologies/netty). Vendors: [Netty](https://junglewise.ai/threats/vendors/netty).

## Quick answers

**Is CVE-2026-93560 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93560 being exploited in the wild.

**How severe is CVE-2026-93560?** High severity, with a CVSS score of 7.5, published 18 September 2026.

**Which products and versions are affected?** Netty <UNKNOWN>.

**Is there a fix for CVE-2026-93560?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-93560 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-93560?** Check whether you run Netty at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## 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

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/jbossnetwork/restricted/listSoftware.html](https://access.redhat.com/jbossnetwork/restricted/listSoftware.html)

## Related threats

- [Netty HTTP/1 decoder request smuggling](https://junglewise.ai/threats/cve-2026-93562-a-flaw-was-found-in-netty-s-http-1-decoder-incomplete-validation)
- [Netty HTTP/1 to HTTP/2 conversion authority mismatch](https://junglewise.ai/threats/cve-2026-93569-netty-http-1-to-http-2-conversion-authority-mismatch)
- [Netty HTTP request smuggling via control characters in chunk size](https://junglewise.ai/threats/cve-2026-93566-netty-http-request-smuggling-via-control-characters-in-chunk-size)
- [Netty RtspDecoder method-token smuggling in RTSP parsing](https://junglewise.ai/threats/cve-2026-93565-netty-rtspdecoder-method-token-smuggling-in-rtsp-parsing)
- [Netty reference-count leak in HAProxy PROXY-v2 decoder](https://junglewise.ai/threats/cve-2026-93564-netty-reference-count-leak-in-haproxy-proxy-v2-decoder)