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Advisory severityMedium6.5Red Hat Linux

Medium [CVE-2026-59920] Improper CR/LF neutralization in netty-codec-stomp

This medium-severity Red Hat Linux advisory covers CVE-2026-59920 affecting Red Hat build of Apache Camel for Spring Boot 4, Red Hat Data Grid 8, Red Hat JBoss Enterprise Application Platform 7.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-59920 Source published Source updated

VulniPulse record published Record updated

CVE-2026-59920
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

Netty is an asynchronous, event-driven network application framework.

In versions prior to 4.1.136.Final and 4.2.16.Final, Netty's STOMP encoder ( StompSubframeEncoder ) does not escape or validate header values in CONNECT and CONNECTED frames, so raw newline ( \n ) characters in a header value are written directly to the wire, allowing an attacker who controls a header value to inject additional STOMP headers.

This happens because the encoder intentionally skips escaping for CONNECT/CONNECTED frames per the STOMP 1.2 specification but never rejects the raw newlines, and since a broker parses each line as a separate header, an attacker controlling a value such as a user-supplied login or passcode can overwrite connection parameters or add authentication/role headers to bypass authentication or escalate privileges (the actual impact is broker-dependent).

A flaw was found in the Netty STOMP (Streaming Text Oriented Messaging Protocol) decoder. This vulnerability allows a remote attacker to inject arbitrary protocol frames by crafting malformed STOMP commands that contain embedded carriage return (CR) and line feed (LF) sequences.

This bypasses message boundary checks and can lead to command injection, potentially compromising the integrity of the system. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

Weakness: CWE-93.

Is CVE-2026-59920 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-59920 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-59920?

Upgrade to a fixed release named by Red Hat:

  • 4.1.136
  • 4.2.16

Confirm against the vendor advisory before you patch.

Affected versions
  • < 4.1.136.Final
  • < 4.2.16.Final

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

Fixed versions
  • 4.1.136
  • 4.2.16

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

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