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TI-2025-35899 Aliases CVE-2025-58056GHSA-fghv-69vj-qj49

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

Priority LOW 16CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 15 fixed, 19 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0071 53rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial netty (netty): 4.2.5.Finalio.netty:netty-codec-http (Maven): 4.1.125.Final, 4.2.5.FinalRed Hat: 13 advisoriesRed Hat: 15 fixed, 19 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nettynetty4.2.0.Alpha3 to before 4.2.5.Final; <= 4.1.124.Final, < 4.1.125.Final4.2.5.FinalPatch availableCNA
—io.netty:netty-codec-http (Maven)before 4.1.125.Final4.1.125.FinalPatch availableGHSA-fghv-69vj-qj49
—io.netty:netty-codec-http (Maven)4.2.0.Alpha1 to before 4.2.5.Final4.2.5.FinalPatch availableGHSA-fghv-69vj-qj49
  • netty Vendornetty Affected 4.2.0.Alpha3 to before 4.2.5.Final; <= 4.1.124.Final, < 4.1.125.Final Fixed in 4.2.5.Final Patch available CNA
  • io.netty:netty-codec-http (Maven) Vendor— Affected before 4.1.125.Final Fixed in 4.1.125.Final Patch available GHSA-fghv-69vj-qj49
  • io.netty:netty-codec-http (Maven) Vendor— Affected 4.2.0.Alpha1 to before 4.2.5.Final Fixed in 4.2.5.Final Patch available GHSA-fghv-69vj-qj49

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*before 4.1.125; 4.2.0 to before 4.2.5Vulnerablenetty
  • cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:* Versions before 4.1.125; 4.2.0 to before 4.2.5 Vulnerable ·netty

Remediation

  • Fix · CNA netty (netty) Fixed in 4.2.5.Final
  • Fix · GHSA-fghv-69vj-qj49 io.netty:netty-codec-http (Maven) Fixed in 4.1.125.Final Advisory →
  • Fix · GHSA-fghv-69vj-qj49 io.netty:netty-codec-http (Maven) Fixed in 4.2.5.Final Advisory →

Red Hat 13 advisories

  • RHSA-2026:34608 Released 2026-07-02 · Red Hat rating Important
    Streams for Apache Kafka 2.9.4 release and security update
    • Streams for Apache Kafka 2.9.4
  • RHSA-2026:3102 Released 2026-02-23 · Red Hat rating Moderate
    AMQ Clients 2026.Q1
    • AMQ Clients 2026.Q1
  • RHSA-2025:23417 Released 2025-12-16 · Red Hat rating Important
    Streams for Apache Kafka 3.1.0 release and security update
    • Streams for Apache Kafka 3.1.0
Show 10 more Red Hat advisories
  • RHSA-2025:21148 Released 2025-11-25 · Red Hat rating Moderate
    Red Hat build of Cryostat 4.1.0: new RHEL 9 container image security update
    • Cryostat 4 on RHEL 9 cryostat/cryostat-agent-init-rhel9, cryostat/cryostat-db-rhel9, cryostat/cryostat-grafana-dashboard-rhel9 +7
  • RHSA-2025:18076 Released 2025-10-15 · Red Hat rating Moderate
    Red Hat Build of Apache Camel 4.10 for Quarkus 3.20 update is now available (RHBQ 3.20.3.GA)
    • Red Hat Build of Apache Camel 4.10 for Quarkus 3.20
  • RHSA-2025:18028 Released 2025-10-14 · Red Hat rating Important
    Red Hat Build of Apache Camel 4.10.7 for Spring Boot release.
    • Red Hat build of Apache Camel 4.10.7 for Spring Boot 3.4.10
  • RHSA-2025:17563 Released 2025-10-14 · Red Hat rating Moderate
    Red Hat build of Quarkus 3.20.3 release and security update
    • Red Hat build of Quarkus 3.20.3.redhat io.netty.netty-codec-4.1.127.Final-redhat-00001.jar, io.netty.netty-codec-http-4.1.127.Final-redhat-00001.jar
  • RHSA-2025:17567 Released 2025-10-08 · Red Hat rating Important
    Red Hat AMQ Broker 7.13.2 release and security update
    • Red Hat AMQ Broker 7.13.2
  • RHSA-2025:17317 Released 2025-10-02 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 8.0.9 security update
    • Red Hat JBoss EAP 8.0 for RHEL 8 eap8-apache-cxf-4.0.9-5.redhat_00002.1.el8eap, eap8-apache-cxf-rt-4.0.9-5.redhat_00002.1.el8eap, eap8-apache-cxf-services-4.0.9-5.redhat_00002.1.el8eap +47
    • Red Hat JBoss EAP 8.0 for RHEL 9 eap8-apache-cxf-4.0.9-5.redhat_00002.1.el9eap, eap8-apache-cxf-rt-4.0.9-5.redhat_00002.1.el9eap, eap8-apache-cxf-services-4.0.9-5.redhat_00002.1.el9eap +47
  • RHSA-2025:17318 Released 2025-10-02 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 8.0.9 security update
    • Red Hat JBoss Enterprise Application Platform 8.0.9
  • RHSA-2025:17298 Released 2025-10-02 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 8.1.0 security update
    • Red Hat JBoss EAP 8.1 for RHEL 8 eap8-apache-commons-lang-3.18.0-1.redhat_00002.1.el8eap, eap8-apache-cxf-4.0.9-4.redhat_00002.1.el8eap, eap8-apache-cxf-rt-4.0.9-4.redhat_00002.1.el8eap +46
    • Red Hat JBoss EAP 8.1 for RHEL 9 eap8-apache-commons-lang-3.18.0-1.redhat_00002.1.el9eap, eap8-apache-cxf-4.0.9-4.redhat_00002.1.el9eap, eap8-apache-cxf-rt-4.0.9-4.redhat_00002.1.el9eap +46
  • RHSA-2025:17299 Released 2025-10-02 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 8.1.0 security update
    • Red Hat JBoss Enterprise Application Platform 8.1.0 io.netty.netty-codec-4.1.127.Final-redhat-00001.jar, io.netty.netty-codec-http-4.1.127.Final-redhat-00001.jar, org.apache.cxf.cxf-rt-transports-jms-4.0.9.redhat-00002.jar +1
  • RHSA-2025:17187 Released 2025-10-02 · Red Hat rating Moderate
    Red Hat build of Quarkus 3.15.7 release and security update
    • Red Hat build of Quarkus 3.15.7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Cryostat 4AffectedNo fix yet
Logging Subsystem for Red Hat OpenShiftAffectedNo fix yet
OpenShift ServerlessAffectedNo fix planned: Will not fix
Red Hat Fuse 7AffectedNo fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix yet
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat OpenShift Dev SpacesAffectedNo fix yet
Red Hat Process Automation 7AffectedNo fix yet
Red Hat Satellite 6AffectedNo fix yet
Red Hat Single Sign-On 7AffectedNo fix yet
Red Hat build of Apache Camel - HawtIO 4AffectedNo fix yet
Red Hat build of Apache Camel 4 for Quarkus 3AffectedNo fix yet
Red Hat build of Apicurio Registry 2AffectedNo fix yet
Red Hat build of Apicurio Registry 3AffectedNo fix yet
Red Hat build of Debezium 2AffectedNo fix planned: Will not fix
Red Hat build of Debezium 3AffectedNo fix planned: Will not fix
Red Hat build of OptaPlanner 8AffectedNo fix yet
Red Hat build of QuarkusAffectedNo fix yet
streams for Apache Kafka 3AffectedNo fix yet
AMQ Clients 2026.Q1Fixed RHSA-2026:3102
Cryostat 4 on RHEL 9Fixed RHSA-2025:21148
Red Hat AMQ Broker 7.13.2Fixed RHSA-2025:17567
Red Hat Build of Apache Camel 4.10 for Quarkus 3.20Fixed RHSA-2025:18076
Red Hat JBoss EAP 8.0 for RHEL 8Fixed RHSA-2025:17317
Red Hat JBoss EAP 8.0 for RHEL 9Fixed RHSA-2025:17317
Red Hat JBoss EAP 8.1 for RHEL 8Fixed RHSA-2025:17298
Red Hat JBoss EAP 8.1 for RHEL 9Fixed RHSA-2025:17298
Red Hat JBoss Enterprise Application Platform 8.0.9Fixed RHSA-2025:17318
Red Hat JBoss Enterprise Application Platform 8.1.0Fixed RHSA-2025:17299
Red Hat build of Apache Camel 4.10.7 for Spring Boot 3.4.10Fixed RHSA-2025:18028
Red Hat build of Quarkus 3.15.7Fixed RHSA-2025:17187
Red Hat build of Quarkus 3.20.3.redhatFixed RHSA-2025:17563
Streams for Apache Kafka 2.9.4Fixed RHSA-2026:34608
Streams for Apache Kafka 3.1.0Fixed RHSA-2025:23417
Not affected: 7 products
  • Red Hat AMQ Clients
  • Red Hat Data Grid 8
  • Red Hat JBoss Enterprise Application Platform 7
  • Red Hat JBoss Enterprise Application Platform 8.1.0
  • Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Satellite 6
  • Red Hat build of Quarkus 3.20.3.redhat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-58056
  2. 2026-10-03 Alias added: GHSA-fghv-69vj-qj49
  3. 2026-10-09 Fix available: RHSA-2026:3102 · Red Hat
  4. 2026-10-10 Fix available: AMQ Clients 2026.Q1 · Red Hat
  5. 2026-10-16 Fix available: Red Hat JBoss Enterprise Application Platform 8.1.0 · Red Hat
  6. 2026-10-20 Fix available: Red Hat build of Quarkus 3.20.3.redhat · Red Hat

References

Exploit 1

Patch 2

Advisory 2

Other 5

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2026-30861 Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization CVSS 3.1CRITICAL 9.8
  • TI-2026-30864 Netty: HttpClientCodec response desynchronization CVSS 3.1CRITICAL 9.1
  • TI-2026-30859 Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder) CVSS 3.1CRITICAL 9.1
  • TI-2026-40973 Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks CVSS 3.1CRITICAL 9.1
  • TI-2026-40972 Uncontrolled resource consumption in netty CVSS 3.1HIGH 7.5
See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences