Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2019-16869

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Published: Sep 26, 2019 | Modified: Jul 07, 2025
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
root.io logo minimus.io logo echo.ai logo
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-16869
CWEhttps://cwe.mitre.org/data/definitions/444.html

Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a Transfer-Encoding : chunked line), which leads to HTTP request smuggling.

Weakness

The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

Affected Software

NameVendorStart VersionEnd Version
NettyNetty*4.1.42 (excluding)
EAP-CD 19 Tech PreviewRedHatnetty*
Red Hat AMQRedHatnetty*
Red Hat AMQ 7.4.3RedHatnetty*
Red Hat Data Grid 7.3.6RedHatnetty*
Red Hat Decision Manager 7RedHatnetty*
Red Hat Fuse 7.5.0RedHatnetty*
Red Hat Fuse 7.9RedHatkaraf-transaction-manager-narayana*
Red Hat JBoss EAP 7.2RedHatnetty*
Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7RedHateap7-netty-0:4.1.45-1.Final_redhat_00001.1.ep7.el7*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-apache-cxf-0:3.2.11-1.redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-glassfish-jsf-0:2.3.5-6.SP3_redhat_00004.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-hal-console-0:3.0.19-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-hibernate-0:5.3.14-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-hibernate-validator-0:6.0.18-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-annotations-0:2.9.10-1.redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-core-0:2.9.10-1.redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-databind-0:2.9.10.1-1.redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-dataformats-binary-0:2.9.10-1.redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-dataformats-text-0:2.9.10-1.redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-jaxrs-providers-0:2.9.10-1.redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-modules-base-0:2.9.10-2.redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jackson-modules-java8-0:2.9.10-1.redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jberet-0:1.3.5-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jboss-ejb-client-0:4.0.27-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jboss-jsf-api_2.3_spec-0:2.3.5-3.SP2_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jboss-server-migration-0:1.3.1-7.Final_redhat_00007.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-jboss-xnio-base-0:3.7.6-3.SP2_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-netty-0:4.1.42-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-picketlink-bindings-0:2.5.5-21.SP12_redhat_00010.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-undertow-0:2.0.28-2.SP1_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-undertow-jastow-0:2.0.8-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-weld-core-0:3.0.6-3.Final_redhat_00003.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-0:7.2.6-5.GA_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-http-client-0:1.0.18-2.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 6RedHateap7-wildfly-transaction-client-0:1.1.8-1.Final_redhat_00001.1.el6eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-apache-cxf-0:3.2.11-1.redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-glassfish-jsf-0:2.3.5-6.SP3_redhat_00004.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-hal-console-0:3.0.19-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-hibernate-0:5.3.14-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-hibernate-validator-0:6.0.18-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-annotations-0:2.9.10-1.redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-core-0:2.9.10-1.redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-databind-0:2.9.10.1-1.redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-dataformats-binary-0:2.9.10-1.redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-dataformats-text-0:2.9.10-1.redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-jaxrs-providers-0:2.9.10-1.redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-modules-base-0:2.9.10-2.redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jackson-modules-java8-0:2.9.10-1.redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jberet-0:1.3.5-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jboss-ejb-client-0:4.0.27-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jboss-jsf-api_2.3_spec-0:2.3.5-3.SP2_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jboss-server-migration-0:1.3.1-7.Final_redhat_00007.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-jboss-xnio-base-0:3.7.6-3.SP2_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-netty-0:4.1.42-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-picketlink-bindings-0:2.5.5-21.SP12_redhat_00010.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-undertow-0:2.0.28-2.SP1_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-undertow-jastow-0:2.0.8-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-weld-core-0:3.0.6-3.Final_redhat_00003.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-0:7.2.6-5.GA_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-http-client-0:1.0.18-2.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 7RedHateap7-wildfly-transaction-client-0:1.1.8-1.Final_redhat_00001.1.el7eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-apache-cxf-0:3.2.11-1.redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-glassfish-jsf-0:2.3.5-6.SP3_redhat_00004.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-hal-console-0:3.0.19-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-hibernate-0:5.3.14-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-hibernate-validator-0:6.0.18-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-annotations-0:2.9.10-1.redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-core-0:2.9.10-1.redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-databind-0:2.9.10.1-1.redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-dataformats-binary-0:2.9.10-1.redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-dataformats-text-0:2.9.10-1.redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-jaxrs-providers-0:2.9.10-1.redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-modules-base-0:2.9.10-2.redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jackson-modules-java8-0:2.9.10-1.redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jberet-0:1.3.5-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jboss-ejb-client-0:4.0.27-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jboss-jsf-api_2.3_spec-0:2.3.5-3.SP2_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jboss-server-migration-0:1.3.1-7.Final_redhat_00007.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-jboss-xnio-base-0:3.7.6-3.SP2_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-netty-0:4.1.42-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-picketlink-bindings-0:2.5.5-21.SP12_redhat_00010.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-undertow-0:2.0.28-2.SP1_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-undertow-jastow-0:2.0.8-1.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-weld-core-0:3.0.6-3.Final_redhat_00003.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-0:7.2.6-5.GA_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-http-client-0:1.0.18-2.Final_redhat_00001.1.el8eap*
Red Hat JBoss Enterprise Application Platform 7.2 for RHEL 8RedHateap7-wildfly-transaction-client-0:1.1.8-1.Final_redhat_00001.1.el8eap*
Red Hat Openshift Application Runtimes Vert.x 3.8.3RedHatnetty*
Red Hat Process Automation 7RedHatnetty*
Red Hat Single Sign-On 7.3RedHatnetty*
NettyUbuntubionic*
NettyUbuntudisco*
NettyUbuntueoan*
NettyUbuntuesm-apps/bionic*
NettyUbuntuesm-apps/xenial*
NettyUbuntuesm-infra-legacy/trusty*
NettyUbuntutrusty*
NettyUbuntutrusty/esm*
NettyUbuntuxenial*
Netty-3.9Ubuntubionic*
Netty-3.9Ubuntuesm-apps/bionic*
Netty-3.9Ubuntuesm-apps/xenial*
Netty-3.9Ubuntutrusty*
Netty-3.9Ubuntuxenial*

Extended Description

HTTP requests or responses (“messages”) can be malformed or unexpected in ways that cause web servers or clients to interpret the messages in different ways than intermediary HTTP agents such as load balancers, reverse proxies, web caching proxies, application firewalls, etc. For example, an adversary may be able to add duplicate or different header fields that a client or server might interpret as one set of messages, whereas the intermediary might interpret the same sequence of bytes as a different set of messages. For example, discrepancies can arise in how to handle duplicate headers like two Transfer-encoding (TE) or two Content-length (CL), or the malicious HTTP message will have different headers for TE and CL. The inconsistent parsing and interpretation of messages can allow the adversary to “smuggle” a message to the client/server without the intermediary being aware of it. This weakness is usually the result of the usage of outdated or incompatible HTTP protocol versions in the HTTP agents.

Potential Mitigations

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2026 Aqua Security Software Ltd.   Privacy Policy | Terms of Use