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Fencer Vulns
medium 5.3

CVE-2026-41417 json

Netty vulnerable to HTTP request smuggling and RTSP request injection via DefaultHttpRequest.setUri()

published 2026-05-05 6 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-28224 , GHSA-v8h7-rr48-vmmv

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

Netty allows request-line validation to be bypassed when a `DefaultHttpRequest` or `DefaultFullHttpRequest` is created first and its URI is later changed via `setUri()`. The constructors reject CRLF and whitespace characters that would break the start-line, but `setUri()` does not apply the same validation. `HttpRequestEncoder` and `RtspEncoder` then write the URI into the request line verbatim. If attacker-controlled input reaches `setUri()`, this enables CRLF injection and insertion of additional HTTP or RTSP requests, leading to HTTP request smuggling or desynchronization on the HTTP side and request injection on the RTSP side. This issue is fixed in versions 4.2.13.Final and 4.1.133.Final.

Patch / fix

  • maven io.netty:netty-codec-http 4.1.133.Final, 4.2.13.Final
  • io.netty netty-codec-http 4.1.133.Final, 4.2.13.Final
  • netty netty 4.1.133.Final, 4.2.13.Final
  • eap7-netty jboss enterprise application platform els 7.4 4.1.135-1.Final_redhat_00001.1.el8eap
  • eap7-wildfly jboss enterprise application platform els 7.4 7.4.25-2.GA_redhat_00001.1.el8eap
  • eap7-undertow jboss enterprise application platform els 7.4 2.2.40-1.SP3_redhat_00001.1.el8eap
  • eap7-netty-all jboss enterprise application platform els 7.4 4.1.135-1.Final_redhat_00001.1.el8eap
  • eap7-ironjacamar jboss enterprise application platform els 7.4 1.5.26-2.Final_redhat_00001.1.el8eap
  • eap7-netty-codec jboss enterprise application platform els 7.4 4.1.135-1.Final_redhat_00001.1.el8eap
  • eap7-jackson-core jboss enterprise application platform els 7.4 2.18.8-1.redhat_00003.1.el8eap
  • eap7-netty-buffer jboss enterprise application platform els 7.4 4.1.135-1.Final_redhat_00001.1.el8eap

red hat advisories RHSA-2026:53645RHSA-2026:53646RHSA-2026:53644

  • netty-tcnative SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.0.77-150200.3.39.1
  • netty SLE Module for Package Hub 15 SP7 4.1.133-150200.4.46.1

suse advisories SUSE-SU-2026:2308-1

  • netty openSUSE Tumbleweed 4.1.133-1.1

opensuse advisories openSUSE-SU-2026:10795-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41417 updated cvss 6.5

netty: Netty: HTTP request smuggling via URI manipulation and CRLF injection

  • Red Hat Cryostat 4 netty-codec-http Red Hat OpenShift Serverless openshift-serverless-1/kn-ekb-receiver-rhel9, openshift-serverless-1/kn-ekb-dispatcher-rhel9, openshift-serverless-1/kn-eventing-integrations-log-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-s3-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-sns-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-sqs-sink-rhel9, +4 more Red Hat AMQ Broker 7 netty-codec-http Red Hat AMQ Clients netty-codec-http Red Hat build of Apache Camel 4 for Quarkus 3 netty-codec-http Red Hat build of Apache Camel for Spring Boot 4 netty-codec-http
    +9 more products
    Red Hat build of Apicurio Registry 2 netty-codec-http Red Hat build of Apicurio Registry 3 netty-codec-http Red Hat build of Debezium 3 netty-codec-http Red Hat Build of Keycloak netty-codec-http, rhbk-rhel9-operator, rhbk/keycloak-rhel9, rhbk-openshift-rhel9, rhbk/keycloak-rhel9-operator Red Hat build of OptaPlanner 8 netty-codec-http Red Hat build of Quarkus netty-codec-http Red Hat Data Grid 8 netty-codec-http Red Hat Enterprise Linux AI (RHEL AI) 3 bazel6, bazel7, bazel8 Red Hat Fuse 7 netty-codec-http
    affected: workaround, no fix available “Fix deferred”
  • Red Hat JBoss Enterprise Application Platform 7 netty-codec-http
    affected: workaround, no fix available
  • Red Hat JBoss Enterprise Application Platform 8 netty-codec-http Red Hat JBoss Enterprise Application Platform Expansion Pack netty-codec-http Red Hat OpenShift AI (RHOAI) rhoai/odh-modelmesh-rhel8, rhoai/odh-modelmesh-rhel9, rhoai/odh-trustyai-service-rhel8, rhoai/odh-trustyai-service-rhel9 Red Hat OpenShift Dev Spaces devspaces/server-rhel9, devspaces/openvsx-rhel9, devspaces/pluginregistry-rhel9, devspaces/multicluster-redirector-rhel9 Red Hat Process Automation 7 netty-codec-http Red Hat Satellite 6 candlepin, candlepin-selinux
    +3 more products
    Red Hat Single Sign-On 7 netty-codec-http Red Hat streams for Apache Kafka 2 netty-codec-http Red Hat streams for Apache Kafka 3 netty-codec-http
    affected: workaround, no fix available “Fix deferred”
  • Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server eap7-wildfly 7.4.25-2.GA_redhat_00001.1.el7eap, eap7-jackson-core 2.18.8-1.redhat_00003.1.el7eap, eap7-netty 4.1.135-1.Final_redhat_00001.1.el7eap, eap7-undertow 2.2.40-2.SP3_redhat_00001.1.el7eap, eap7-jackson-databind 2.18.8-1.redhat_00003.1.el7eap, eap7-netty-all 4.1.135-1.Final_redhat_00001.1.el7eap, +78 more
    fixed: vendor fix RHSA-2026:53644
  • Red Hat JBoss Enterprise Application Platform 7.4.25
    fixed: vendor fix RHSA-2026:53806

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/netty/netty/security/advisories/GHSA-v8h7-rr48-vmmv referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven io.netty:netty-codec-http
<4.1.133.Final
>=4.2.0.Alpha1, <4.2.13.Final
4.1.133.Final
4.2.13.Final

Affected products

  • netty netty

Classification

Weakness
  • CWE-93 Improper Neutralization of CRLF Sequences
  • CWE-444 Inconsistent Interpretation of HTTP Requests

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.