{"schema_version":1,"title":"Netty Project Netty Codec HTTP vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 12 vulnerabilities in Netty Project Netty Codec HTTP: 1 in the last 7 days and 7 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-100666, was published on 26 September 2026.","url":"https://junglewise.ai/threats/technologies/codec-http","json_url":"https://junglewise.ai/threats/technologies/codec-http.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/codec-http","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":6,"all_time":12,"critical":0,"exploited":0,"last_7_days":1,"last_30_days":1,"last_90_days":7,"last_365_days":12},"latest":[{"cve":"CVE-2026-100666","cvss":7.3,"slug":"cve-2026-100666-netty-s-httpservercodec-io-netty-netty-codec-http-in-versions-4","title":"Netty HttpServerCodec response desynchronization","severity":"high","exploited":false,"published_at":"2026-09-26T14:16:49.83+00:00","url":"https://junglewise.ai/threats/cve-2026-100666-netty-s-httpservercodec-io-netty-netty-codec-http-in-versions-4"},{"cve":"CVE-2026-59899","cvss":4,"epss":0.0061,"slug":"cve-2026-59899-netty-resource-exhaustion-in-httpcontentencoder-via-http","title":"Netty resource exhaustion in HttpContentEncoder via HTTP pipelining","severity":"medium","exploited":false,"published_at":"2026-07-29T18:16:56.137+00:00","url":"https://junglewise.ai/threats/cve-2026-59899-netty-resource-exhaustion-in-httpcontentencoder-via-http"},{"cve":"CVE-2026-59921","cvss":5.7,"epss":0.0047,"slug":"cve-2026-59921-netty-crlf-injection-in-httppostrequestencoder-multipart","title":"Netty CRLF injection in HttpPostRequestEncoder multipart filenames","severity":"medium","exploited":false,"published_at":"2026-07-28T23:17:09.923+00:00","url":"https://junglewise.ai/threats/cve-2026-59921-netty-crlf-injection-in-httppostrequestencoder-multipart"},{"cve":"CVE-2026-56746","cvss":6.5,"epss":0.0041,"slug":"cve-2026-56746-netty-security-bypass-in-corshandler-origin-evaluation","title":"Netty security bypass in CorsHandler origin evaluation","severity":"medium","exploited":false,"published_at":"2026-07-21T22:17:14.667+00:00","url":"https://junglewise.ai/threats/cve-2026-56746-netty-security-bypass-in-corshandler-origin-evaluation"},{"cve":"CVE-2026-56745","cvss":4,"epss":0.0063,"slug":"cve-2026-56745-netty-memory-leak-in-spdyhttpdecoder-leading-to-dos","title":"Netty memory leak in SpdyHttpDecoder leading to DoS","severity":"high","exploited":false,"published_at":"2026-07-21T22:17:14.5+00:00","url":"https://junglewise.ai/threats/cve-2026-56745-netty-memory-leak-in-spdyhttpdecoder-leading-to-dos"},{"cve":"CVE-2026-55833","cvss":7.5,"epss":0.0067,"slug":"cve-2026-55833-netty-resource-exhaustion-in-spdy-header-decoding","title":"Netty resource exhaustion in SPDY header decoding","severity":"high","exploited":false,"published_at":"2026-07-21T00:17:35.537+00:00","url":"https://junglewise.ai/threats/cve-2026-55833-netty-resource-exhaustion-in-spdy-header-decoding"},{"cve":"CVE-2026-55831","cvss":7.5,"epss":0.0067,"slug":"cve-2026-55831-netty-resource-exhaustion-in-spdy-settings-decoder","title":"Netty resource exhaustion in SPDY SETTINGS decoder","severity":"high","exploited":false,"published_at":"2026-07-21T00:17:35.383+00:00","url":"https://junglewise.ai/threats/cve-2026-55831-netty-resource-exhaustion-in-spdy-settings-decoder"},{"cve":"CVE-2026-50020","cvss":5.3,"epss":0.004,"slug":"cve-2026-50020-netty-http-request-smuggling-in-httpobjectdecoder","title":"Netty HTTP request smuggling in HttpObjectDecoder","severity":"medium","exploited":false,"published_at":"2026-06-12T16:16:31.447+00:00","url":"https://junglewise.ai/threats/cve-2026-50020-netty-http-request-smuggling-in-httpobjectdecoder"},{"cve":"CVE-2026-42587","cvss":7.5,"epss":0.0105,"slug":"cve-2026-42587-netty-denial-of-service-via-decompression-limit-bypass","title":"Netty denial of service via decompression limit bypass","severity":"high","exploited":false,"published_at":"2026-05-13T19:17:24.46+00:00","url":"https://junglewise.ai/threats/cve-2026-42587-netty-denial-of-service-via-decompression-limit-bypass"},{"cve":"CVE-2026-42585","cvss":6.5,"epss":0.0029,"slug":"cve-2026-42585-netty-http-request-smuggling-via-malformed-transfer-encoding","title":"Netty HTTP request smuggling via malformed Transfer-Encoding","severity":"medium","exploited":false,"published_at":"2026-05-13T19:17:24.187+00:00","url":"https://junglewise.ai/threats/cve-2026-42585-netty-http-request-smuggling-via-malformed-transfer-encoding"},{"cve":"CVE-2026-42584","cvss":7.3,"epss":0.0072,"slug":"cve-2026-42584-netty-httpclientcodec-response-desynchronization","title":"Netty HttpClientCodec response desynchronization","severity":"high","exploited":false,"published_at":"2026-05-13T19:17:24.043+00:00","url":"https://junglewise.ai/threats/cve-2026-42584-netty-httpclientcodec-response-desynchronization"},{"cve":"CVE-2026-42581","cvss":5.8,"epss":0.0068,"slug":"cve-2026-42581-netty-http-request-smuggling-in-httpobjectdecoder","title":"Netty HTTP request smuggling in HttpObjectDecoder","severity":"medium","exploited":false,"published_at":"2026-05-13T19:17:23.627+00:00","url":"https://junglewise.ai/threats/cve-2026-42581-netty-http-request-smuggling-in-httpobjectdecoder"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":4},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":2},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":1}],"related":[{"name":"Netty Project Netty Codec Redis","slug":"codec-redis","vulnerabilities":5,"url":"https://junglewise.ai/threats/technologies/codec-redis"},{"name":"Netty Project Netty Incubator Codec OHTTP","slug":"incubator-codec-ohttp","vulnerabilities":4,"url":"https://junglewise.ai/threats/technologies/incubator-codec-ohttp"},{"name":"Netty Project Netty netty-codec-http2","slug":"netty-codec-http2","vulnerabilities":4,"url":"https://junglewise.ai/threats/technologies/netty-codec-http2"},{"name":"Netty Project Netty Codec HAProxy","slug":"codec-haproxy","vulnerabilities":3,"url":"https://junglewise.ai/threats/technologies/codec-haproxy"},{"name":"Netty Project Netty Handler SSL OCSP","slug":"netty-handler-ssl-ocsp","vulnerabilities":3,"url":"https://junglewise.ai/threats/technologies/netty-handler-ssl-ocsp"},{"name":"Netty Project Netty Resolver DNS","slug":"resolver-dns","vulnerabilities":3,"url":"https://junglewise.ai/threats/technologies/resolver-dns"}],"technology":{"hub":true,"name":"Netty Project Netty Codec HTTP","slug":"codec-http","vendor":{"name":"Netty Project","slug":"netty-project","url":"https://junglewise.ai/threats/vendors/netty-project"},"aliases":["netty-codec-http"],"category":"library","homepage":"https://netty.io/","repo_url":"https://github.com/netty/netty","description":"An HTTP codec implementation for the Netty event-driven network application framework.","url":"https://junglewise.ai/threats/technologies/codec-http"},"most_severe":[{"cve":"CVE-2026-42587","cvss":7.5,"epss":0.0105,"slug":"cve-2026-42587-netty-denial-of-service-via-decompression-limit-bypass","title":"Netty denial of service via decompression limit bypass","severity":"high","exploited":false,"published_at":"2026-05-13T19:17:24.46+00:00","url":"https://junglewise.ai/threats/cve-2026-42587-netty-denial-of-service-via-decompression-limit-bypass"},{"cve":"CVE-2026-55833","cvss":7.5,"epss":0.0067,"slug":"cve-2026-55833-netty-resource-exhaustion-in-spdy-header-decoding","title":"Netty resource exhaustion in SPDY header decoding","severity":"high","exploited":false,"published_at":"2026-07-21T00:17:35.537+00:00","url":"https://junglewise.ai/threats/cve-2026-55833-netty-resource-exhaustion-in-spdy-header-decoding"},{"cve":"CVE-2026-55831","cvss":7.5,"epss":0.0067,"slug":"cve-2026-55831-netty-resource-exhaustion-in-spdy-settings-decoder","title":"Netty resource exhaustion in SPDY SETTINGS decoder","severity":"high","exploited":false,"published_at":"2026-07-21T00:17:35.383+00:00","url":"https://junglewise.ai/threats/cve-2026-55831-netty-resource-exhaustion-in-spdy-settings-decoder"},{"cve":"CVE-2026-42584","cvss":7.3,"epss":0.0072,"slug":"cve-2026-42584-netty-httpclientcodec-response-desynchronization","title":"Netty HttpClientCodec response desynchronization","severity":"high","exploited":false,"published_at":"2026-05-13T19:17:24.043+00:00","url":"https://junglewise.ai/threats/cve-2026-42584-netty-httpclientcodec-response-desynchronization"},{"cve":"CVE-2026-100666","cvss":7.3,"slug":"cve-2026-100666-netty-s-httpservercodec-io-netty-netty-codec-http-in-versions-4","title":"Netty HttpServerCodec response desynchronization","severity":"high","exploited":false,"published_at":"2026-09-26T14:16:49.83+00:00","url":"https://junglewise.ai/threats/cve-2026-100666-netty-s-httpservercodec-io-netty-netty-codec-http-in-versions-4"},{"cve":"CVE-2026-56745","cvss":4,"epss":0.0063,"slug":"cve-2026-56745-netty-memory-leak-in-spdyhttpdecoder-leading-to-dos","title":"Netty memory leak in SpdyHttpDecoder leading to DoS","severity":"high","exploited":false,"published_at":"2026-07-21T22:17:14.5+00:00","url":"https://junglewise.ai/threats/cve-2026-56745-netty-memory-leak-in-spdyhttpdecoder-leading-to-dos"},{"cve":"CVE-2026-56746","cvss":6.5,"epss":0.0041,"slug":"cve-2026-56746-netty-security-bypass-in-corshandler-origin-evaluation","title":"Netty security bypass in CorsHandler origin evaluation","severity":"medium","exploited":false,"published_at":"2026-07-21T22:17:14.667+00:00","url":"https://junglewise.ai/threats/cve-2026-56746-netty-security-bypass-in-corshandler-origin-evaluation"},{"cve":"CVE-2026-42585","cvss":6.5,"epss":0.0029,"slug":"cve-2026-42585-netty-http-request-smuggling-via-malformed-transfer-encoding","title":"Netty HTTP request smuggling via malformed Transfer-Encoding","severity":"medium","exploited":false,"published_at":"2026-05-13T19:17:24.187+00:00","url":"https://junglewise.ai/threats/cve-2026-42585-netty-http-request-smuggling-via-malformed-transfer-encoding"},{"cve":"CVE-2026-42581","cvss":5.8,"epss":0.0068,"slug":"cve-2026-42581-netty-http-request-smuggling-in-httpobjectdecoder","title":"Netty HTTP request smuggling in HttpObjectDecoder","severity":"medium","exploited":false,"published_at":"2026-05-13T19:17:23.627+00:00","url":"https://junglewise.ai/threats/cve-2026-42581-netty-http-request-smuggling-in-httpobjectdecoder"},{"cve":"CVE-2026-59921","cvss":5.7,"epss":0.0047,"slug":"cve-2026-59921-netty-crlf-injection-in-httppostrequestencoder-multipart","title":"Netty CRLF injection in HttpPostRequestEncoder multipart filenames","severity":"medium","exploited":false,"published_at":"2026-07-28T23:17:09.923+00:00","url":"https://junglewise.ai/threats/cve-2026-59921-netty-crlf-injection-in-httppostrequestencoder-multipart"}],"generated_at":"2026-09-26T15:07:00.181821+00:00"}