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… (CVE-2026-59920)
Description
CVE-2026-59920 is a medium severity vulnerability in the Netty network application framework affecting versions prior to 4.1.136.Final and 4.2.16.Final. The issue involves the STOMP encoder (StompSubframeEncoder) not properly escaping or validating header values, leading to improper neutralization of CRLF sequences in HTTP headers (CWE-93). This vulnerability impacts data integrity but does not affect confidentiality or availability. No known exploits are reported in the wild, and no official patch or remediation information is provided.
CVSS v3.1
Score 6.5medium
Affected software
pkg:deb/ubuntu/netty?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/netty?arch=source&distro=esm-apps-legacy/xenialpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/netty?arch=source&distro=stonkingpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Netty's STOMP encoder allows improper neutralization of CRLF sequences in HTTP headers, potentially enabling injection of unintended header data. It affects versions prior to 4.1.136.Final and 4.2.16.Final, as well as several specific older versions listed. The CVSS 3.1 base score is 6.5, indicating medium severity with network attack vector, low attack complexity, requiring low privileges, and no user interaction. The flaw impacts integrity but not confidentiality or availability. No vendor advisory or patch information is available, and no known exploitation has been reported.
Potential Impact
The vulnerability allows an attacker to inject or manipulate HTTP headers due to improper escaping of CRLF sequences, potentially compromising data integrity. There is no impact on confidentiality or availability. The attack requires network access and low privileges but no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider mitigating exposure by validating and sanitizing STOMP header inputs where possible in their own implementations.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-3g8r-4pfx-jmfh
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-59920"]
- Ecosystems
- ["Maven"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a6150d39c2644c7f8da06cc
Added to database: 07/22/2026, 23:22:59 UTC
Last enriched: 10/18/2026, 04:34:36 UTC
Last updated: 10/21/2026, 13:20:22 UTC
Views: 108
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