# org.jboss.netty:netty (Maven) vulnerabilities

Source: https://junglewise.ai/threats/technologies/org-jboss-netty-netty  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/org-jboss-netty-netty.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 10 vulnerabilities in org.jboss.netty:netty (Maven): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2021-43797, was published on 9 December 2021.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 10 (0 critical, 0 exploited in the wild)

## About org.jboss.netty:netty (Maven)

A Java NIO client server framework which enables quick and easy development of network applications.

## Latest org.jboss.netty:netty (Maven) vulnerabilities

- [CVE-2021-43797: HTTP request smuggling in netty](https://junglewise.ai/threats/cve-2021-43797-http-request-smuggling-in-netty) (low, CVSS 3.1, published 9 Dec 2021)
- [CVE-2021-37137: SnappyFrameDecoder doesn't restrict chunk length any may buffer skippable chunks in an unnecessary way](https://junglewise.ai/threats/cve-2021-37137-snappyframedecoder-doesn-t-restrict-chunk-length-any-may-buffer) (low, CVSS 3.1, published 9 Sep 2021)
- [CVE-2021-37136: Bzip2Decoder doesn't allow setting size restrictions for decompressed data](https://junglewise.ai/threats/cve-2021-37136-bzip2decoder-doesn-t-allow-setting-size-restrictions-for) (low, CVSS 3.1, published 9 Sep 2021)
- [CVE-2021-21409: Possible request smuggling in HTTP/2 due missing validation of content-length](https://junglewise.ai/threats/cve-2021-21409-possible-request-smuggling-in-http-2-due-missing-validation-of) (low, CVSS 3.1, published 30 Mar 2021)
- [CVE-2021-21295: Possible request smuggling in HTTP/2 due missing validation](https://junglewise.ai/threats/cve-2021-21295-possible-request-smuggling-in-http-2-due-missing-validation) (low, CVSS 3.1, published 9 Mar 2021)
- [CVE-2021-21290: Local Information Disclosure Vulnerability in Netty on Unix-Like systems](https://junglewise.ai/threats/cve-2021-21290-local-information-disclosure-vulnerability-in-netty-on-unix-like) (low, CVSS 3.1, published 8 Feb 2021)
- [CVE-2015-2156: Information Exposure in Netty](https://junglewise.ai/threats/cve-2015-2156-information-exposure-in-netty) (low, CVSS 3, published 30 Jun 2020)
- [CVE-2019-20444: HTTP Request Smuggling in Netty](https://junglewise.ai/threats/cve-2019-20444-http-request-smuggling-in-netty) (low, CVSS 3.1, published 21 Feb 2020)
- [CVE-2019-20445: HTTP Request Smuggling in Netty](https://junglewise.ai/threats/cve-2019-20445-http-request-smuggling-in-netty) (info, published 21 Feb 2020)
- [CVE-2019-16869: Netty HTTP request smuggling via header whitespace mishandling](https://junglewise.ai/threats/cve-2019-16869-netty-http-request-smuggling-via-header-whitespace-mishandling) (high, CVSS 7.5, published 11 Oct 2019)

## Most severe org.jboss.netty:netty (Maven) vulnerabilities

- [CVE-2019-16869: Netty HTTP request smuggling via header whitespace mishandling](https://junglewise.ai/threats/cve-2019-16869-netty-http-request-smuggling-via-header-whitespace-mishandling) (high, CVSS 7.5, published 11 Oct 2019)
- [CVE-2021-21295: Possible request smuggling in HTTP/2 due missing validation](https://junglewise.ai/threats/cve-2021-21295-possible-request-smuggling-in-http-2-due-missing-validation) (low, CVSS 3.1, published 9 Mar 2021)
- [CVE-2019-20444: HTTP Request Smuggling in Netty](https://junglewise.ai/threats/cve-2019-20444-http-request-smuggling-in-netty) (low, CVSS 3.1, published 21 Feb 2020)
- [CVE-2021-37137: SnappyFrameDecoder doesn't restrict chunk length any may buffer skippable chunks in an unnecessary way](https://junglewise.ai/threats/cve-2021-37137-snappyframedecoder-doesn-t-restrict-chunk-length-any-may-buffer) (low, CVSS 3.1, published 9 Sep 2021)
- [CVE-2021-37136: Bzip2Decoder doesn't allow setting size restrictions for decompressed data](https://junglewise.ai/threats/cve-2021-37136-bzip2decoder-doesn-t-allow-setting-size-restrictions-for) (low, CVSS 3.1, published 9 Sep 2021)
- [CVE-2021-21409: Possible request smuggling in HTTP/2 due missing validation of content-length](https://junglewise.ai/threats/cve-2021-21409-possible-request-smuggling-in-http-2-due-missing-validation-of) (low, CVSS 3.1, published 30 Mar 2021)
- [CVE-2021-43797: HTTP request smuggling in netty](https://junglewise.ai/threats/cve-2021-43797-http-request-smuggling-in-netty) (low, CVSS 3.1, published 9 Dec 2021)
- [CVE-2021-21290: Local Information Disclosure Vulnerability in Netty on Unix-Like systems](https://junglewise.ai/threats/cve-2021-21290-local-information-disclosure-vulnerability-in-netty-on-unix-like) (low, CVSS 3.1, published 8 Feb 2021)
- [CVE-2015-2156: Information Exposure in Netty](https://junglewise.ai/threats/cve-2015-2156-information-exposure-in-netty) (low, CVSS 3, published 30 Jun 2020)
- [CVE-2019-20445: HTTP Request Smuggling in Netty](https://junglewise.ai/threats/cve-2019-20445-http-request-smuggling-in-netty) (info, published 21 Feb 2020)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Maven technologies

- [org.jenkins-ci.main:jenkins-core (Maven)](https://junglewise.ai/threats/technologies/org-jenkins-ci-main-jenkins-core): 259 vulnerabilities
- [org.apache.tomcat:tomcat (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat): 169 vulnerabilities
- [com.liferay.portal:release.portal.bom (Maven)](https://junglewise.ai/threats/technologies/com-liferay-portal-release-portal-bom): 159 vulnerabilities
- [com.liferay.portal:release.dxp.bom (Maven)](https://junglewise.ai/threats/technologies/com-liferay-portal-release-dxp-bom): 125 vulnerabilities
- [org.keycloak:keycloak-services (Maven)](https://junglewise.ai/threats/technologies/org-keycloak-keycloak-services): 122 vulnerabilities
- [com.fasterxml.jackson.core:jackson-databind (Maven)](https://junglewise.ai/threats/technologies/com-fasterxml-jackson-core-jackson-databind): 86 vulnerabilities
- [org.apache.tomcat.embed:tomcat-embed-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-embed-tomcat-embed-core): 83 vulnerabilities
- [org.apache.struts:struts2-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-struts-struts2-core): 60 vulnerabilities
- [org.keycloak:keycloak-core (Maven)](https://junglewise.ai/threats/technologies/org-keycloak-keycloak-core): 57 vulnerabilities
- [org.xwiki.platform:xwiki-platform-oldcore (Maven)](https://junglewise.ai/threats/technologies/org-xwiki-platform-xwiki-platform-oldcore): 46 vulnerabilities
- [org.apache.tomcat:tomcat-catalina (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat-catalina): 44 vulnerabilities
- [org.elasticsearch:elasticsearch (Maven)](https://junglewise.ai/threats/technologies/org-elasticsearch-elasticsearch): 41 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "org.jboss.netty:netty (Maven) vulnerabilities", https://junglewise.ai/threats/technologies/org-jboss-netty-netty, 9 November 2026.