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Fencer Vulns
high 7.5

CVE-2025-58056 json

Netty is vulnerable to request smuggling due to incorrect parsing of chunk extensions

published 2025-09-03 14 mo ago modified 2026-10-19 20 d ago also EUVD-2025-26640 , GHSA-fghv-69vj-qj49

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Netty is an asynchronous event-driven network application framework for development of maintainable high performance protocol servers and clients. In versions 4.1.124.Final, and 4.2.0.Alpha3 through 4.2.4.Final, Netty incorrectly accepts standalone newline characters (LF) as a chunk-size line terminator, regardless of a preceding carriage return (CR), instead of requiring CRLF per HTTP/1.1 standards. When combined with reverse proxies that parse LF differently (treating it as part of the chunk extension), attackers can craft requests that the proxy sees as one request but Netty processes as two, enabling request smuggling attacks. This is fixed in versions 4.1.125.Final and 4.2.5.Final.

Patch / fix

  • maven io.netty:netty-codec-http 4.1.125.Final, 4.2.5.Final
  • io.netty netty-codec-http 4.1.125.Final, 4.2.5.Final
  • netty netty 4.1.125.Final, 4.2.5.Final
  • netty Debian 12 1:4.1.48-7+deb12u2
  • netty Debian 13 1:4.1.48-10+deb13u1
  • netty Debian 14 1:4.1.48-13

debian advisories DEBIAN-CVE-2025-58056

  • netty Ubuntu 22.04 LTS 1:4.1.48-4+deb11u2ubuntu0.1
  • netty Ubuntu 24.04 LTS 1:4.1.48-9ubuntu0.1
  • netty Ubuntu 25.10 1:4.1.48-10ubuntu0.25.10.2
  • netty Ubuntu Pro 16.04 LTS 1:4.0.34-1ubuntu0.1~esm3
  • netty Ubuntu Pro 18.04 LTS 1:4.1.7-4ubuntu0.1+esm5
  • netty Ubuntu Pro 20.04 LTS 1:4.1.45-1ubuntu0.1~esm4

ubuntu advisories UBUNTU-CVE-2025-58056

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • eap8-netty jboss enterprise application platform 8.1, jboss enterprise application platform 8.0 4.1.127-1.Final_redhat_00001.1.el8eap
  • eap8-netty jboss enterprise application platform 8.1, jboss enterprise application platform 8.0 4.1.127-1.Final_redhat_00001.1.el9eap
  • eap8-wss4j jboss enterprise application platform 8.1, jboss enterprise application platform 8.0 3.0.4-1.redhat_00002.1.el8eap
  • eap8-wss4j jboss enterprise application platform 8.1, jboss enterprise application platform 8.0 3.0.4-1.redhat_00002.1.el9eap
  • eap8-wildfly jboss enterprise application platform 8.0 8.0.9-8.GA_redhat_00008.1.el8eap
  • eap8-wildfly jboss enterprise application platform 8.0 8.0.9-8.GA_redhat_00008.1.el9eap
  • eap8-opensaml jboss enterprise application platform 8.1, jboss enterprise application platform 8.0 4.3.2-2.redhat_00002.1.el8eap
  • eap8-opensaml jboss enterprise application platform 8.1, jboss enterprise application platform 8.0 4.3.2-2.redhat_00002.1.el9eap

red hat advisories RHSA-2025:17317RHSA-2025:17298

  • netty-tcnative SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 2.0.73-150200.3.30.1
  • netty SLE Module for Package Hub 15 SP7, SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 4.1.126-150200.4.34.1

suse advisories SUSE-SU-2025:03114-1

  • netty openSUSE Tumbleweed 4.1.126-1.1

opensuse advisories openSUSE-SU-2025:15520-1

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-2025-58056 updated cvss 7.5

netty-codec-http: Netty is vulnerable to request smuggling due to incorrect parsing of chunk extensions

  • Red Hat Cryostat 4 netty-codec-http2 Red Hat Logging Subsystem for Red Hat OpenShift netty-codec-http, netty-codec-http2
    affected: workaround, no fix available
  • Red Hat OpenShift Serverless openshift-serverless-1/kn-ekb-receiver-rhel8, openshift-serverless-1/kn-ekb-dispatcher-rhel8, openshift-serverless-1/kn-eventing-integrations-log-sink-rhel8, openshift-serverless-1/kn-eventing-integrations-aws-s3-sink-rhel8, openshift-serverless-1/kn-eventing-integrations-aws-sns-sink-rhel8, openshift-serverless-1/kn-eventing-integrations-aws-sqs-sink-rhel8, +4 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat build of Apache Camel - HawtIO 4 netty-codec-http, netty-codec-http2 Red Hat build of Apache Camel 4 for Quarkus 3 netty-codec-http, netty-codec-http2 Red Hat build of Apicurio Registry 2 netty-codec-http, netty-codec-http2 Red Hat build of Apicurio Registry 3 netty-codec-http, netty-codec-http2
    affected: workaround, no fix available
  • Red Hat build of Debezium 2 netty-codec-http, netty-codec-http2 Red Hat build of Debezium 3 netty-codec-http, netty-codec-http2
    affected: workaround, no fix planned “Will not fix”
  • Red Hat build of OptaPlanner 8 netty-codec-http, netty-codec-http2 Red Hat build of Quarkus netty-codec-http2
    affected: workaround, no fix available
  • Red Hat Fuse 7 netty-codec-http, netty-codec-http2
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat JBoss Enterprise Application Platform 7 netty-codec-http2 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/pluginregistry-rhel9 Red Hat Process Automation 7 netty-codec-http, netty-codec-http2 Red Hat Satellite 6 candlepin, candlepin-selinux Red Hat Single Sign-On 7 netty-codec-http, netty-codec-http2
    +1 more products
    Red Hat streams for Apache Kafka 3 netty-codec-http2
    affected: workaround, no fix available
  • Red Hat AMQ Clients 2026.Q1
    fixed: vendor fix RHSA-2026:3102
show 14 more
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-rhel9 4.1.0-11, cryostat/cryostat-db-rhel9 4.1.0-11, cryostat/jfr-datasource-rhel9 4.1.0-11, cryostat/cryostat-reports-rhel9 4.1.0-11, cryostat/cryostat-storage-rhel9 4.1.0-11, cryostat/cryostat-rhel9-operator 4.1.0-11, +4 more
    fixed: vendor fix RHSA-2025:21148
  • Red Hat AMQ Broker 7.13.2
    fixed: vendor fix RHSA-2025:17567
  • Red Hat Build of Apache Camel 4.10 for Quarkus 3.20
    fixed: vendor fix RHSA-2025:18076
  • Red Hat build of Apache Camel 4.10.7 for Spring Boot 3.4.10
    fixed: vendor fix RHSA-2025:18028
  • Red Hat build of Quarkus 3.15.7
    fixed: vendor fix RHSA-2025:17187
  • Red Hat build of Quarkus 3.20.3.redhat netty-codec-http 4.1.127.Final-redhat-00001
    fixed: vendor fix RHSA-2025:17563
  • Red Hat JBoss EAP 8.0 for RHEL 8 eap8-wss4j 3.0.4-1.redhat_00002.1.el8eap, eap8-opensaml 4.3.2-2.redhat_00002.1.el8eap, eap8-apache-cxf 4.0.9-5.redhat_00002.1.el8eap, eap8-cxf-xjc-dv 4.1.0-1.redhat_00001.1.el8eap, eap8-cxf-xjc-ts 4.1.0-1.redhat_00001.1.el8eap, eap8-wildfly 8.0.9-8.GA_redhat_00008.1.el8eap, +49 more Red Hat JBoss EAP 8.0 for RHEL 9 eap8-wss4j 3.0.4-1.redhat_00002.1.el9eap, eap8-opensaml 4.3.2-2.redhat_00002.1.el9eap, eap8-apache-cxf 4.0.9-5.redhat_00002.1.el9eap, eap8-cxf-xjc-dv 4.1.0-1.redhat_00001.1.el9eap, eap8-cxf-xjc-ts 4.1.0-1.redhat_00001.1.el9eap, eap8-wildfly 8.0.9-8.GA_redhat_00008.1.el9eap, +49 more
    fixed: vendor fix RHSA-2025:17317
  • Red Hat JBoss EAP 8.1 for RHEL 8 eap8-wss4j 3.0.4-1.redhat_00002.1.el8eap, eap8-opensaml 4.3.2-2.redhat_00002.1.el8eap, eap8-apache-cxf 4.0.9-4.redhat_00002.1.el8eap, eap8-wildfly 8.1.0-55.GA_redhat_00016.1.el8eap, eap8-wss4j-policy 3.0.4-1.redhat_00002.1.el8eap, eap8-xml-security 3.0.5-1.redhat_00001.1.el8eap, +43 more Red Hat JBoss EAP 8.1 for RHEL 9 eap8-wss4j 3.0.4-1.redhat_00002.1.el9eap, eap8-opensaml 4.3.2-2.redhat_00002.1.el9eap, eap8-apache-cxf 4.0.9-4.redhat_00002.1.el9eap, eap8-wildfly 8.1.0-55.GA_redhat_00016.1.el9eap, eap8-wss4j-policy 3.0.4-1.redhat_00002.1.el9eap, eap8-xml-security 3.0.5-1.redhat_00001.1.el9eap, +43 more
    fixed: vendor fix RHSA-2025:17298
  • Red Hat JBoss Enterprise Application Platform 8.0.9
    fixed: vendor fix RHSA-2025:17318
  • Red Hat JBoss Enterprise Application Platform 8.1.0 netty-codec-http 4.1.127.Final-redhat-00001
    fixed: vendor fix RHSA-2025:17299
  • Red Hat Streams for Apache Kafka 2.9.4
    fixed: vendor fix RHSA-2026:34608
  • Red Hat Streams for Apache Kafka 3.1.0
    fixed: vendor fix RHSA-2025:23417
  • Red Hat AMQ Clients netty-codec-http2
    not affected: component not present
  • Red Hat build of Quarkus 3.20.3.redhat jna 5.8.0, lit 3.2.1, bson 5.3.1, db2 1.20.6, h2 2.3.230, y18n 5.0.8, +1016 more Red Hat Data Grid 8 netty-codec-http, netty-codec-http2 Red Hat JBoss Enterprise Application Platform 7 netty-codec-http Red Hat JBoss Enterprise Application Platform 8.1.0 pom.xml, aesh 2.4, c3 0.6.4, d3 7.4.3, he 1.2.0, lr 1.4.2, +1859 more Red Hat JBoss Enterprise Application Platform Expansion Pack netty-codec-http, netty-codec-http2
    not affected: vulnerable code not present

1 more not affected in the full advisory

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
none
Automatable
no
Technical impact
partial
Assessed
14 mo ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/netty/netty/security/advisories/GHSA-fghv-69vj-qj49 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 2.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
CNA 4.0 2.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven io.netty:netty-codec-http
<4.1.125.Final
>=4.2.0.Alpha1, <4.2.5.Final
4.1.125.Final
4.2.5.Final

Affected products

  • netty netty

Classification

Weakness
  • 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.