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NVD / CVE Program· CNA GitHub_M

CVE-2026-41417: Netty vulnerable to HTTP request smuggling and RTSP request injection via DefaultHttpRequest.setUri()

MediumCVSS 5.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.31% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: io.netty:netty-codec-http (Maven) 4.2.13.Final, 4.1.133.Final; netty (openSUSE:Tumbleweed) 4.1.133-1.1; eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap.

Low priority for now. Upgrade to io.netty:netty-codec-http (Maven) 4.2.13.Final, 4.1.133.Final; netty (openSUSE:Tumbleweed) 4.1.133-1.1; eap7-activemq-artemis (Red Hat:jboss_enterprise_application_platform_els:7.4::el7) 0:2.16.0-22.redhat_00057.1.el7eap or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
May 6, 2026
Updated
Nov 11, 2026
EPSS
0.3% · 25th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
5.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-41417

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
nettynetty

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • netty netty

    • >= 4.2.0.Alpha1, <= 4.2.12.Final, <= 4.1.132.Finalaffected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netty nettybefore 4.1.133
  • netty netty4.2.0 and later · before 4.2.13

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12nettyfrom 0—
Mavenio.netty:netty-codec-httpfrom 4.2.0.Alpha1 · before 4.2.13.Final4.2.13.Final
Mavenio.netty:netty-codec-httpbefore 4.1.133.Final4.1.133.Final
openSUSE:Tumbleweednettybefore 4.1.133-1.14.1.133-1.1
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemisbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-clibefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-commonsbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-core-clientbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-dtobefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-hornetq-protocolbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-hqclient-protocolbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-jdbc-storebefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-jms-clientbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-jms-serverbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-journalbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-rabefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-selectorbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-serverbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-service-extensionsbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-activemq-artemis-toolsbefore 0:2.16.0-22.redhat_00057.1.el7eap0:2.16.0-22.redhat_00057.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-glassfish-jsfbefore 0:2.3.14-11.SP11_redhat_00001.1.el7eap0:2.3.14-11.SP11_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamarbefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamar-common-apibefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap
Red Hat:jboss_enterprise_application_platform_els:7.4::el7eap7-ironjacamar-common-implbefore 0:1.5.26-2.Final_redhat_00001.1.el7eap0:1.5.26-2.Final_redhat_00001.1.el7eap

+96

Same product

netty: all records

Other highest-scoring records for the same primary product.

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Published before and after this one in the same product

  • ← EarlierCVE-2026-33870Mar 27, 2026 · Netty: HTTP Request Smuggling via Chunked Extension Quoted-String Parsing
    30Monitor
  • ← EarlierCVE-2026-33871Mar 27, 2026 · Netty HTTP/2 CONTINUATION Frame Flood DoS via Zero-Byte Frame Bypass
    34Monitor
  • Later →CVE-2026-42577May 13, 2026 · Netty: epoll transport denial of service via RST on half-closed TCP connection
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:io.netty:netty-codec-http4.1.133.FinalPackage registry (OSV)
Maven:io.netty:netty-codec-http4.2.13.FinalPackage registry (OSV)
opensuse:netty4.1.133-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:eap7-activemq-artemis0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-cli0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-commons0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-core-client0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-dto0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-hornetq-protocol0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-hqclient-protocol0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-jdbc-store0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-jms-client0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-jms-server0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-journal0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
red hat:eap7-activemq-artemis-ra0:2.16.0-22.redhat_00057.1.el7eap · Red Hat:jboss_enterprise_application_platform_els:7.4::el7Package registry (OSV)
suse:netty4.1.133-150200.4.46.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7Package registry (OSV)
suse:netty-tcnative2.0.77-150200.3.39.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-425867 days apartNetty: CRLF Injection in Netty Redis Codec Encoder
    28Monitor
  • CVE-2026-5992183 days apartNetty: CRLF Injection via Multipart Filename in Netty HttpPostRequestEncoder
    26Monitor
  • CVE-2026-5992084 days apartNetty: STOMP CONNECT Frame Header Injection
    26Monitor
  • CVE-2025-67735141 days apartNetty has a CRLF Injection vulnerability in io.netty.handler.codec.http.HttpRequestEncoder
    26Monitor
  • CVE-2026-5991984 days apartNetty: HAProxy V1 Protocol CRLF Injection via AF_UNIX Address
    22Monitor
  • CVE-2025-59419203 days apartNetty netty-codec-smtp SMTP Command Injection Vulnerability Allowing Email Forgery
    22Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

All records