# io.netty:netty-codec (Maven) vulnerabilities

Source: https://junglewise.ai/threats/technologies/io-netty-netty-codec  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/io-netty-netty-codec.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in io.netty:netty-codec (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-2026-59901, was published on 29 July 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 5 (0 critical, 0 exploited in the wild)

## About io.netty:netty-codec (Maven)

Core codec framework for Netty providing message encoding and decoding.

## Latest io.netty:netty-codec (Maven) vulnerabilities

- [CVE-2026-59901: Netty Bzip2Decoder infinite loop denial of service](https://junglewise.ai/threats/cve-2026-59901-netty-bzip2decoder-infinite-loop-denial-of-service) (high, CVSS 4, published 29 Jul 2026)
- [CVE-2026-42583: Netty Lz4FrameDecoder resource exhaustion](https://junglewise.ai/threats/cve-2026-42583-netty-lz4framedecoder-resource-exhaustion) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2025-58057: Netty's decoders vulnerable to DoS via zip bomb style attack](https://junglewise.ai/threats/cve-2025-58057-netty-s-decoders-vulnerable-to-dos-via-zip-bomb-style-attack) (medium, CVSS 4, published 3 Sep 2025)
- [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)

## Most severe io.netty:netty-codec (Maven) vulnerabilities

- [CVE-2026-42583: Netty Lz4FrameDecoder resource exhaustion](https://junglewise.ai/threats/cve-2026-42583-netty-lz4framedecoder-resource-exhaustion) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-59901: Netty Bzip2Decoder infinite loop denial of service](https://junglewise.ai/threats/cve-2026-59901-netty-bzip2decoder-infinite-loop-denial-of-service) (high, CVSS 4, published 29 Jul 2026)
- [CVE-2025-58057: Netty's decoders vulnerable to DoS via zip bomb style attack](https://junglewise.ai/threats/cve-2025-58057-netty-s-decoders-vulnerable-to-dos-via-zip-bomb-style-attack) (medium, CVSS 4, published 3 Sep 2025)
- [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)

## 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 |

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- [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, "io.netty:netty-codec (Maven) vulnerabilities", https://junglewise.ai/threats/technologies/io-netty-netty-codec, 11 November 2026.