TI-2026-44520 Aliases CVE-2026-62380 GHSA-jmpc-xv4r-m7fw

Netty before 4.2.16.Final SOCKS Proxy Null Byte Injection

LOW 28CWE-626Published 2026-08-22 · Updated 2026-08-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · None · None
Fix status: Partial Red Hat: 18 without a fix

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

Summary

Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain null byte, CRLF, and credential injection vulnerabilities in the SOCKS4 (Socks4ClientEncoder) and SOCKS5 (Socks5ClientEncoder) client encoders, which fail to validate domain address and authentication (username/password) fields. An attacker able to control these fields can inject null bytes or CRLF characters to truncate or alter values, potentially enabling domain spoofing, SOCKS4 userid truncation, authentication data injection, and protocol confusion. Fixed in 4.2.17.Final and 4.1.137.Final.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00253 16th percentileScored 2026-11-07

Fix Partial netty (netty): 4.2.16.Final, 4.1.137.FinalRed Hat: 18 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

Vendor	Product	Affected versions	Fixed in	Status	Source
netty	netty	4.2.0.Final to before 4.2.16.Final	4.2.16.Final	Patch available	CNA
netty	netty	before 4.1.137.Final	4.1.137.Final	Patch available	CNA

netty Vendornetty Affected 4.2.0.Final to before 4.2.16.Final Fixed in 4.2.16.Final Patch available CNA
netty Vendornetty Affected before 4.1.137.Final Fixed in 4.1.137.Final Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:netty:netty::::::::	before 4.1.137; 4.2.0 to before 4.2.17	Vulnerable	netty

cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:* Versions before 4.1.137; 4.2.0 to before 4.2.17 Vulnerable ·netty

Remediation

Fix · CNA netty (netty) Fixed in 4.2.16.Final
Fix · CNA netty (netty) Fixed in 4.1.137.Final

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-08-22
netty 4.1.137.Final, 4.2.16.Final
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-44466 Netty 4.2.0 through 4.2.16 TLS Hostname Verification BypassPriority MEDIUM 43
Show all 2 records →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Exploit Intelligence	Affected	No fix planned: Out of support scope
OpenShift Serverless	Affected	No fix yet: Fix deferred
Red Hat AMQ Broker 7	Affected	No fix yet: Fix deferred
Red Hat Build of Keycloak	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3	Affected	No fix yet: Fix deferred
Red Hat Fuse 7	Affected	No fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 7	Affected	No fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 8	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform Expansion Pack	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred
Red Hat OpenShift Dev Spaces	Affected	No fix yet: Fix deferred
Red Hat Satellite 6	Affected	No fix yet: Fix deferred
Red Hat Single Sign-On 7	Affected	No fix planned: Out of support scope
Red Hat build of Apache Camel 4 for Quarkus 3	Affected	No fix yet: Fix deferred
Red Hat build of Apache Camel for Spring Boot 4	Affected	No fix yet: Fix deferred
Red Hat build of Apicurio Registry 3	Affected	No fix planned: Out of support scope
Red Hat build of Debezium 3	Affected	No fix yet: Fix deferred
Red Hat build of Quarkus	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-62380
2026-10-03 Alias added: GHSA-jmpc-xv4r-m7fw

References

Advisory 1

GitHub Security Advisory (GHSA-cc6x-ffm5-83wf)

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