# Netty vulnerabilities Source: https://junglewise.ai/threats/technologies/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/netty.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 25 vulnerabilities in Netty: 0 in the last 7 days and 17 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-93562, was published on 18 September 2026. Nothing in the last four weeks, down from 12 vulnerabilities in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 17 - All time: 25 (1 critical, 0 exploited in the wild) ## About Netty Java networking framework for building high-performance network applications. ## Latest Netty vulnerabilities - [CVE-2026-93562: Netty HTTP/1 decoder request smuggling](https://junglewise.ai/threats/cve-2026-93562-a-flaw-was-found-in-netty-s-http-1-decoder-incomplete-validation) (medium, CVSS 6.5, published 18 Sep 2026) - [CVE-2026-93569: Netty HTTP/1 to HTTP/2 conversion authority mismatch](https://junglewise.ai/threats/cve-2026-93569-netty-http-1-to-http-2-conversion-authority-mismatch) (high, CVSS 8.2, published 18 Sep 2026) - [CVE-2026-93566: Netty HTTP request smuggling via control characters in chunk size](https://junglewise.ai/threats/cve-2026-93566-netty-http-request-smuggling-via-control-characters-in-chunk-size) (medium, CVSS 6.5, published 18 Sep 2026) - [CVE-2026-93565: Netty RtspDecoder method-token smuggling in RTSP parsing](https://junglewise.ai/threats/cve-2026-93565-netty-rtspdecoder-method-token-smuggling-in-rtsp-parsing) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93564: Netty reference-count leak in HAProxy PROXY-v2 decoder](https://junglewise.ai/threats/cve-2026-93564-netty-reference-count-leak-in-haproxy-proxy-v2-decoder) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93558: Netty WebSocketServerExtensionHandler denial of service](https://junglewise.ai/threats/cve-2026-93558-netty-websocketserverextensionhandler-denial-of-service) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93560: Netty STOMP codec integer truncation denial of service](https://junglewise.ai/threats/cve-2026-93560-netty-stomp-codec-integer-truncation-denial-of-service) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93492: Netty HTTP/2 HpackEncoder Denial of Service](https://junglewise.ai/threats/cve-2026-93492-netty-http-2-hpackencoder-denial-of-service) (medium, CVSS 5.3, published 18 Sep 2026) - [CVE-2026-93491: Netty HttpServerCodec denial of service via HTTP request pipelining](https://junglewise.ai/threats/cve-2026-93491-netty-httpservercodec-denial-of-service-via-http-request) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93488: Netty SpdySessionHandler unbounded stream denial of service](https://junglewise.ai/threats/cve-2026-93488-netty-spdysessionhandler-unbounded-stream-denial-of-service) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93578: Netty OCSP Client EKU verification bypass](https://junglewise.ai/threats/cve-2026-93578-netty-ocsp-client-eku-verification-bypass) (medium, CVSS 5.9, published 18 Sep 2026) - [CVE-2026-93575: Netty MqttDecoder MQTT packet validation bypass](https://junglewise.ai/threats/cve-2026-93575-a-flaw-was-found-in-netty-s-mqttdecoder-an-unauthenticated-remote) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-89044: Netty HTTP Transfer-Encoding request smuggling](https://junglewise.ai/threats/cve-2026-89044-netty-http-transfer-encoding-request-smuggling) (medium, CVSS 6.5, published 10 Sep 2026) - [CVE-2026-76816: Netty MqttEncoder null byte injection in MQTT fields](https://junglewise.ai/threats/cve-2026-76816-netty-mqttencoder-null-byte-injection-in-mqtt-fields) (low, CVSS 3.5, published 24 Aug 2026) - [CVE-2026-75596: Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default…](https://junglewise.ai/threats/cve-2026-75596-netty-quadratic-pre-handshake-clienthello-reassembly-in-sni) (high, CVSS 7.5, published 19 Aug 2026) - [CVE-2026-75595: Netty SNI routing bypass via fragmented TLS ClientHello](https://junglewise.ai/threats/cve-2026-75595-netty-sni-routing-bypass-via-fragmented-tls-clienthello) (critical, CVSS 9.1, published 19 Aug 2026) - [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-2026-56818: Netty RedisArrayAggregator memory leak in RESP decoding](https://junglewise.ai/threats/cve-2026-56818-netty-redisarrayaggregator-memory-leak-in-resp-decoding) (medium, CVSS 6.5, published 7 Aug 2026) - [CVE-2026-50011: Netty memory exhaustion in RedisArrayAggregator](https://junglewise.ai/threats/cve-2026-50011-netty-memory-exhaustion-in-redisarrayaggregator) (high, CVSS 7.5, published 12 Jun 2026) - [CVE-2026-44890: Netty memory exhaustion in RedisDecoder](https://junglewise.ai/threats/cve-2026-44890-netty-memory-exhaustion-in-redisdecoder) (high, CVSS 7.5, published 11 Jun 2026) - [CVE-2026-42586: Netty Redis codec CRLF injection in RedisEncoder](https://junglewise.ai/threats/cve-2026-42586-netty-redis-codec-crlf-injection-in-redisencoder) (medium, CVSS 6.8, published 13 May 2026) - [CVE-2026-42582: Netty unbounded memory allocation in HTTP/3 QPACK decoder](https://junglewise.ai/threats/cve-2026-42582-netty-unbounded-memory-allocation-in-http-3-qpack-decoder) (high, CVSS 7.5, published 13 May 2026) - [CVE-2026-42577: Netty denial of service in epoll transport via RST on half-closed connection](https://junglewise.ai/threats/cve-2026-42577-netty-denial-of-service-in-epoll-transport-via-rst-on-half-closed) (high, CVSS 7.5, 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-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 Netty vulnerabilities - [CVE-2026-75595: Netty SNI routing bypass via fragmented TLS ClientHello](https://junglewise.ai/threats/cve-2026-75595-netty-sni-routing-bypass-via-fragmented-tls-clienthello) (critical, CVSS 9.1, published 19 Aug 2026) - [CVE-2026-93569: Netty HTTP/1 to HTTP/2 conversion authority mismatch](https://junglewise.ai/threats/cve-2026-93569-netty-http-1-to-http-2-conversion-authority-mismatch) (high, CVSS 8.2, published 18 Sep 2026) - [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-2026-93491: Netty HttpServerCodec denial of service via HTTP request pipelining](https://junglewise.ai/threats/cve-2026-93491-netty-httpservercodec-denial-of-service-via-http-request) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-50011: Netty memory exhaustion in RedisArrayAggregator](https://junglewise.ai/threats/cve-2026-50011-netty-memory-exhaustion-in-redisarrayaggregator) (high, CVSS 7.5, published 12 Jun 2026) - [CVE-2026-44890: Netty memory exhaustion in RedisDecoder](https://junglewise.ai/threats/cve-2026-44890-netty-memory-exhaustion-in-redisdecoder) (high, CVSS 7.5, published 11 Jun 2026) - [CVE-2026-93564: Netty reference-count leak in HAProxy PROXY-v2 decoder](https://junglewise.ai/threats/cve-2026-93564-netty-reference-count-leak-in-haproxy-proxy-v2-decoder) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93558: Netty WebSocketServerExtensionHandler denial of service](https://junglewise.ai/threats/cve-2026-93558-netty-websocketserverextensionhandler-denial-of-service) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93488: Netty SpdySessionHandler unbounded stream denial of service](https://junglewise.ai/threats/cve-2026-93488-netty-spdysessionhandler-unbounded-stream-denial-of-service) (high, CVSS 7.5, published 18 Sep 2026) - [CVE-2026-93575: Netty MqttDecoder MQTT packet validation bypass](https://junglewise.ai/threats/cve-2026-93575-a-flaw-was-found-in-netty-s-mqttdecoder-an-unauthenticated-remote) (high, CVSS 7.5, published 18 Sep 2026) ## Vulnerabilities per week Nothing in the last four weeks, down from 12 vulnerabilities in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 3 | 1 | 0 | | 24 Aug 2026 | 1 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 1 | 0 | 0 | | 14 Sep 2026 | 12 | 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 Netty technologies - [Netty-Codec-Http](https://junglewise.ai/threats/technologies/netty-netty-codec-http): 18 vulnerabilities - [Netty-Handler](https://junglewise.ai/threats/technologies/netty-handler): 5 vulnerabilities - [Netty Codec HTTP/3](https://junglewise.ai/threats/technologies/codec-http-3): 4 vulnerabilities - [Netty-Codec-Http3](https://junglewise.ai/threats/technologies/netty-codec-http3): 4 vulnerabilities - [Netty TCNative](https://junglewise.ai/threats/technologies/tcnative): 4 vulnerabilities - [Netty-Resolver-Dns](https://junglewise.ai/threats/technologies/netty-resolver-dns): 3 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, "Netty vulnerabilities", https://junglewise.ai/threats/technologies/netty, 9 November 2026.