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

Source: https://junglewise.ai/threats/technologies/io-netty-netty-codec-http  
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-http.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 24 vulnerabilities in io.netty:netty-codec-http (Maven): 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-59903, was published on 17 August 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 24 (0 critical, 0 exploited in the wild)

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

Netty codec module for HTTP protocol message encoding and decoding.

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

- [CVE-2026-59903: Netty CorsHandler cache poisoning via Vary header overwrite](https://junglewise.ai/threats/cve-2026-59903-netty-corshandler-cache-poisoning-via-vary-header-overwrite) (medium, CVSS 6.5, published 17 Aug 2026)
- [CVE-2026-59898: Netty HTTP request smuggling via lax WebSocket handshake validation](https://junglewise.ai/threats/cve-2026-59898-netty-http-request-smuggling-via-lax-websocket-handshake) (medium, CVSS 4, published 29 Jul 2026)
- [CVE-2026-59899: Netty resource exhaustion in HttpContentEncoder via HTTP pipelining](https://junglewise.ai/threats/cve-2026-59899-netty-resource-exhaustion-in-httpcontentencoder-via-http) (medium, CVSS 4, published 29 Jul 2026)
- [CVE-2026-59921: Netty CRLF injection in HttpPostRequestEncoder multipart filenames](https://junglewise.ai/threats/cve-2026-59921-netty-crlf-injection-in-httppostrequestencoder-multipart) (medium, CVSS 5.7, published 28 Jul 2026)
- [CVE-2026-56746: Netty security bypass in CorsHandler origin evaluation](https://junglewise.ai/threats/cve-2026-56746-netty-security-bypass-in-corshandler-origin-evaluation) (medium, CVSS 6.5, published 21 Jul 2026)
- [CVE-2026-56745: Netty memory leak in SpdyHttpDecoder leading to DoS](https://junglewise.ai/threats/cve-2026-56745-netty-memory-leak-in-spdyhttpdecoder-leading-to-dos) (high, CVSS 4, published 21 Jul 2026)
- [CVE-2026-55833: Netty resource exhaustion in SPDY header decoding](https://junglewise.ai/threats/cve-2026-55833-netty-resource-exhaustion-in-spdy-header-decoding) (high, CVSS 7.5, published 21 Jul 2026)
- [CVE-2026-55831: Netty resource exhaustion in SPDY SETTINGS decoder](https://junglewise.ai/threats/cve-2026-55831-netty-resource-exhaustion-in-spdy-settings-decoder) (high, CVSS 7.5, published 21 Jul 2026)
- [CVE-2026-50020: Netty HTTP request smuggling in HttpObjectDecoder](https://junglewise.ai/threats/cve-2026-50020-netty-http-request-smuggling-in-httpobjectdecoder) (medium, CVSS 5.3, published 12 Jun 2026)
- [CVE-2026-42587: Netty denial of service via decompression limit bypass](https://junglewise.ai/threats/cve-2026-42587-netty-denial-of-service-via-decompression-limit-bypass) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-42585: Netty HTTP request smuggling via malformed Transfer-Encoding](https://junglewise.ai/threats/cve-2026-42585-netty-http-request-smuggling-via-malformed-transfer-encoding) (medium, CVSS 6.5, published 13 May 2026)
- [CVE-2026-42584: Netty HttpClientCodec response desynchronization](https://junglewise.ai/threats/cve-2026-42584-netty-httpclientcodec-response-desynchronization) (high, CVSS 7.3, published 13 May 2026)
- [CVE-2026-42581: Netty HTTP request smuggling in HttpObjectDecoder](https://junglewise.ai/threats/cve-2026-42581-netty-http-request-smuggling-in-httpobjectdecoder) (medium, CVSS 5.8, published 13 May 2026)
- [CVE-2026-42580: Netty integer overflow in HTTP chunk size parser](https://junglewise.ai/threats/cve-2026-42580-netty-integer-overflow-in-http-chunk-size-parser) (medium, CVSS 6.5, published 13 May 2026)
- [CVE-2026-41417: Netty CRLF injection in DefaultHttpRequest setUri](https://junglewise.ai/threats/cve-2026-41417-netty-crlf-injection-in-defaulthttprequest-seturi) (medium, CVSS 5.3, published 6 May 2026)
- [CVE-2026-33870: Netty request smuggling via chunked extension quoted-string parsing](https://junglewise.ai/threats/cve-2026-33870-netty-request-smuggling-via-chunked-extension-quoted-string) (high, CVSS 7.5, published 27 Mar 2026)
- [CVE-2025-67735: Netty has a CRLF Injection vulnerability in io.netty.handler.codec.http.HttpRequestEncoder](https://junglewise.ai/threats/cve-2025-67735-netty-has-a-crlf-injection-vulnerability-in-io-netty-handler) (medium, CVSS 6.5, published 16 Dec 2025)
- [CVE-2025-58056: Netty vulnerable to request smuggling due to incorrect parsing of chunk extensions](https://junglewise.ai/threats/cve-2025-58056-netty-vulnerable-to-request-smuggling-due-to-incorrect-parsing-of) (info, published 4 Sep 2025)
- [CVE-2024-29025: Netty's HttpPostRequestDecoder can OOM](https://junglewise.ai/threats/cve-2024-29025-netty-s-httppostrequestdecoder-can-oom) (low, CVSS 3.1, published 25 Mar 2024)
- [CVE-2022-41915: Netty vulnerable to HTTP Response splitting from assigning header value iterator](https://junglewise.ai/threats/cve-2022-41915-netty-vulnerable-to-http-response-splitting-from-assigning-header) (low, CVSS 3.1, published 12 Dec 2022)
- [CVE-2022-24823: Local Information Disclosure Vulnerability in io.netty:netty-codec-http](https://junglewise.ai/threats/cve-2022-24823-local-information-disclosure-vulnerability-in-io-netty-netty) (low, CVSS 3.1, published 10 May 2022)
- [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-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)

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

- [CVE-2026-42587: Netty denial of service via decompression limit bypass](https://junglewise.ai/threats/cve-2026-42587-netty-denial-of-service-via-decompression-limit-bypass) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-33870: Netty request smuggling via chunked extension quoted-string parsing](https://junglewise.ai/threats/cve-2026-33870-netty-request-smuggling-via-chunked-extension-quoted-string) (high, CVSS 7.5, published 27 Mar 2026)
- [CVE-2026-55833: Netty resource exhaustion in SPDY header decoding](https://junglewise.ai/threats/cve-2026-55833-netty-resource-exhaustion-in-spdy-header-decoding) (high, CVSS 7.5, published 21 Jul 2026)
- [CVE-2026-55831: Netty resource exhaustion in SPDY SETTINGS decoder](https://junglewise.ai/threats/cve-2026-55831-netty-resource-exhaustion-in-spdy-settings-decoder) (high, CVSS 7.5, published 21 Jul 2026)
- [CVE-2026-42584: Netty HttpClientCodec response desynchronization](https://junglewise.ai/threats/cve-2026-42584-netty-httpclientcodec-response-desynchronization) (high, CVSS 7.3, published 13 May 2026)
- [CVE-2026-56745: Netty memory leak in SpdyHttpDecoder leading to DoS](https://junglewise.ai/threats/cve-2026-56745-netty-memory-leak-in-spdyhttpdecoder-leading-to-dos) (high, CVSS 4, published 21 Jul 2026)
- [CVE-2026-56746: Netty security bypass in CorsHandler origin evaluation](https://junglewise.ai/threats/cve-2026-56746-netty-security-bypass-in-corshandler-origin-evaluation) (medium, CVSS 6.5, published 21 Jul 2026)
- [CVE-2026-42580: Netty integer overflow in HTTP chunk size parser](https://junglewise.ai/threats/cve-2026-42580-netty-integer-overflow-in-http-chunk-size-parser) (medium, CVSS 6.5, published 13 May 2026)
- [CVE-2025-67735: Netty has a CRLF Injection vulnerability in io.netty.handler.codec.http.HttpRequestEncoder](https://junglewise.ai/threats/cve-2025-67735-netty-has-a-crlf-injection-vulnerability-in-io-netty-handler) (medium, CVSS 6.5, published 16 Dec 2025)
- [CVE-2026-42585: Netty HTTP request smuggling via malformed Transfer-Encoding](https://junglewise.ai/threats/cve-2026-42585-netty-http-request-smuggling-via-malformed-transfer-encoding) (medium, CVSS 6.5, published 13 May 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 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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- [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, "io.netty:netty-codec-http (Maven) vulnerabilities", https://junglewise.ai/threats/technologies/io-netty-netty-codec-http, 11 November 2026.