# Netty vulnerabilities Source: https://junglewise.ai/threats/vendors/netty Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/netty.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 69 vulnerabilities in Netty: 0 in the last 7 days and 33 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-116542, was published on 26 October 2026. 4 vulnerabilities in the last four weeks, down 80% on the four before (20). 7 technologies have a page of their own. ## Counts - Last 7 days: 0 - Last 30 days: 4 - Last 90 days: 33 - All time: 69 (1 critical, 0 exploited in the wild) ## About Netty An open-source asynchronous event-driven network application framework for rapid development of maintainable high-performance protocol servers and clients. ## Latest Netty vulnerabilities - [CVE-2026-116542: Netty netty-tcnative SNI hostname spoofing](https://junglewise.ai/threats/cve-2026-116542-netty-netty-tcnative-before-2-0-84-final-contains-an-sni) (medium, CVSS 5.3, published 26 Oct 2026) - [CVE-2026-116541: Netty netty-tcnative denial of service in BIO write callback](https://junglewise.ai/threats/cve-2026-116541-netty-netty-tcnative-before-2-0-84-final-contains-a-denial-of) (medium, CVSS 5.9, published 26 Oct 2026) - [CVE-2026-116540: Netty TCNative use-after-free in session ticket key rotation](https://junglewise.ai/threats/cve-2026-116540-netty-tcnative-2-0-66-final-before-2-0-84-final-built-against) (medium, CVSS 5.9, published 26 Oct 2026) - [CVE-2026-116539: Netty netty-tcnative heap buffer overflow in BIO callback](https://junglewise.ai/threats/cve-2026-116539-netty-netty-tcnative-before-2-0-84-final-contains-a-heap-buffer) (medium, CVSS 5.9, published 26 Oct 2026) - [CVE-2026-100663: Netty HTTP/3 codec CONNECT authority-form parsing bypass](https://junglewise.ai/threats/cve-2026-100663-netty-s-http-3-codec-io-netty-netty-codec-http3-from-4-2-2-final) (high, CVSS 7.5, published 26 Sep 2026) - [CVE-2026-100662: Netty HTTP/3 QPACK encoder-stream unbounded memory consumption](https://junglewise.ai/threats/cve-2026-100662-netty-s-http-3-codec-io-netty-netty-codec-http3-versions-4-2-0) (high, CVSS 7.5, published 26 Sep 2026) - [CVE-2026-100661: Netty HTTP/3 codec QPACK prefixed-integer denial-of-service](https://junglewise.ai/threats/cve-2026-100661-netty-s-http-3-codec-io-netty-netty-codec-http3-versions-4-2-0) (high, CVSS 7.5, published 26 Sep 2026) - [CVE-2026-100660: Netty netty-codec-http3 unbounded QPACK encoder memory retention](https://junglewise.ai/threats/cve-2026-100660-netty-s-http-3-codec-io-netty-netty-codec-http3-from-4-2-0-final) (high, CVSS 7.5, published 26 Sep 2026) - [CVE-2026-100658: Netty unbounded queue denial of service in WebSocketServerExtensionHandler](https://junglewise.ai/threats/cve-2026-100658-netty-io-netty-netty-codec-http-contains-an-unbounded-per) (medium, CVSS 5.3, published 26 Sep 2026) - [CVE-2026-100657: Netty STOMP codec ByteBuf leak in StompSubframeDecoder](https://junglewise.ai/threats/cve-2026-100657-netty-s-stomp-codec-io-netty-netty-codec-stomp-contains-a) (high, CVSS 7.5, published 26 Sep 2026) - [CVE-2026-100656: Netty HttpServerCodec unbounded queue growth via HTTP/1.1 pipelining](https://junglewise.ai/threats/cve-2026-100656-netty-io-netty-netty-codec-http-contains-an-unbounded-per) (high, CVSS 7.5, published 26 Sep 2026) - [CVE-2026-100655: Netty netty-codec-http denial of service in SpdySessionHandler](https://junglewise.ai/threats/cve-2026-100655-netty-io-netty-netty-codec-http-versions-up-to-and-including-4-1) (high, CVSS 7.5, published 26 Sep 2026) - [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) ## 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-2026-47691: Netty DNS cache poisoning via insufficient NS record bailiwick validation](https://junglewise.ai/threats/cve-2026-47691-netty-dns-cache-poisoning-via-insufficient-ns-record-bailiwick) (high, CVSS 8.7, published 12 Jun 2026) - [CVE-2026-45674: Netty DNS cache poisoning via missing CNAME bailiwick validation](https://junglewise.ai/threats/cve-2026-45674-netty-dns-cache-poisoning-via-missing-cname-bailiwick-validation) (high, CVSS 8.7, published 12 Jun 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-2026-61798: Netty netty-incubator-codec-ohttp HPKE private key exposure in toString()](https://junglewise.ai/threats/cve-2026-61798-netty-netty-incubator-codec-ohttp-hpke-private-key-exposure-in) (high, CVSS 8.1, published 20 Aug 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-2026-45416: Netty excessive memory allocation in SNIHandler](https://junglewise.ai/threats/cve-2026-45416-netty-excessive-memory-allocation-in-snihandler) (high, CVSS 7.5, 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-2026-93491: 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) ## Vulnerabilities per week 4 vulnerabilities in the last four weeks, down 80% on the four before (20). | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 7 | 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 | 8 | 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 | 4 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Netty technologies - [Netty](https://junglewise.ai/threats/technologies/netty): 25 vulnerabilities - [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/vendors/netty, 9 November 2026.