CVE-2026-33870 - High Severity Vulnerability
Vulnerable Libraries - netty-codec-http-4.1.34.Final.jar, netty-codec-http-4.1.43.Final.jar
netty-codec-http-4.1.34.Final.jar
Netty is an asynchronous event-driven network application framework for
rapid development of maintainable high performance protocol servers and
clients.
Library home page: http://netty.io/
Path to vulnerable library: /home/wss-scanner/.ivy2/cache/io.netty/netty-codec-http/jars/netty-codec-http-4.1.34.Final.jar
Dependency Hierarchy:
- play-netty-server_2.13-2.7.5.jar (Root Library)
- netty-reactive-streams-http-2.0.3.jar
- ❌ netty-codec-http-4.1.34.Final.jar (Vulnerable Library)
netty-codec-http-4.1.43.Final.jar
Netty is an asynchronous event-driven network application framework for
rapid development of maintainable high performance protocol servers and
clients.
Library home page: https://netty.io/
Path to vulnerable library: /home/wss-scanner/.ivy2/cache/io.netty/netty-codec-http/jars/netty-codec-http-4.1.43.Final.jar
Dependency Hierarchy:
- play-netty-server_2.13-2.8.2.jar (Root Library)
- netty-reactive-streams-http-2.0.4.jar
- ❌ netty-codec-http-4.1.43.Final.jar (Vulnerable Library)
Found in HEAD commit: 2819174635979a19573ec0ce8e3e2b63a3848079
Found in base branch: master
Vulnerability Details
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
Publish Date: 2026-03-27
URL: CVE-2026-33870
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-pwqr-wmgm-9rr8
Release Date: 2026-03-26
Fix Resolution: io.netty:netty-codec-http:4.1.132.Final,io.netty:netty-codec-http:4.2.10.Final
CVE-2026-33870 - High Severity Vulnerability
netty-codec-http-4.1.34.Final.jar
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients.
Library home page: http://netty.io/
Path to vulnerable library: /home/wss-scanner/.ivy2/cache/io.netty/netty-codec-http/jars/netty-codec-http-4.1.34.Final.jar
Dependency Hierarchy:
netty-codec-http-4.1.43.Final.jar
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients.
Library home page: https://netty.io/
Path to vulnerable library: /home/wss-scanner/.ivy2/cache/io.netty/netty-codec-http/jars/netty-codec-http-4.1.43.Final.jar
Dependency Hierarchy:
Found in HEAD commit: 2819174635979a19573ec0ce8e3e2b63a3848079
Found in base branch: master
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
Publish Date: 2026-03-27
URL: CVE-2026-33870
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: GHSA-pwqr-wmgm-9rr8
Release Date: 2026-03-26
Fix Resolution: io.netty:netty-codec-http:4.1.132.Final,io.netty:netty-codec-http:4.2.10.Final