{"id":"CVE-2026-42584","title":"Netty is an asynchronous, event-driven network application framework","summary":"Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll() once per response, including for 1xx. If …","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-444"],"vendor":"netty","product":"netty","affected":["netty < 4.1.133","netty >= 4.2.0, < 4.2.13"],"patched":["netty 4.2.13"],"published":"2026-05-13","updated":"2026-09-18","sourceUpdated":"2026-09-18T13:18:20.810","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42584","references":[{"url":"https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3","label":"security-advisories@github.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:23808","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:24502","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:25123","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:28010","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36820","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:37390","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:42644","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:49700","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:49701","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53644","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53645","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53646","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:54435","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:65126","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66488","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66545","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-42584","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2477224","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://github.com/netty/netty/security/advisories/GHSA-57rv-r2g8-2cj3","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42584.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53806","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-42584"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42584"},{"url":"https://access.redhat.com/errata/RHSA-2026:69459"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"epss":0.00838,"epssPercentile":0.56246,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-05-13T18:35:01.642953Z"},"ingestedAt":"2026-07-10T07:59:54.542Z","slug":"CVE-2026-42584","body":"## Overview\n\nNetty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpClientCodec pairs each inbound response with an outbound request by queue.poll() once per response, including for 1xx. If the client pipelines GET then HEAD and the server sends 103, then 200 with GET body, then 200 for HEAD, the queue pairs HEAD with the first 200. The HEAD rule then skips reading that message’s body, so the GET entity bytes stay on the stream and the following 200 is parsed from the wrong offset. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.\n\n## Affected\n\n- `netty < 4.1.133`\n- `netty >= 4.2.0, < 4.2.13`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `netty 4.2.13`\n\n## Vendor advisories\n\n- **RHSA-2026:49700** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 10, Red Hat JBoss EAP 8.1 for RHEL 8, Red Hat JBoss EAP 8.1 for RHEL 9 · released 2026-08-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:49700)\n- **RHSA-2026:53644** · Red Hat · fixed in: Red Hat JBoss EAP 7.4 ELS for RHEL 7 Server · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53644)\n- **RHSA-2026:28010** · Red Hat · fixed in: Cryostat 4 on RHEL 9 · released 2026-06-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:28010)\n- **RHSA-2026:53806** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 7.4.25 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53806)\n- **RHSA-2026:42644** · Red Hat · fixed in: Red Hat OpenShift AI 2.25 · released 2026-07-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:42644)\n- **RHSA-2026:25123** · Red Hat · fixed in: Red Hat OpenShift Dev Spaces 3.28 · released 2026-06-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:25123)\n- **RHSA-2026:36820** · Red Hat · fixed in: Red Hat OpenShift Dev Spaces 3.29 · released 2026-07-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:36820)\n- **RHSA-2026:37390** · Red Hat · fixed in: Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16 · released 2026-07-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:37390)\n- **RHSA-2026:23808** · Red Hat · fixed in: Red Hat build of Quarkus 3.27.4 · released 2026-06-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:23808)\n- **RHSA-2026:24502** · Red Hat · fixed in: Red Hat build of Quarkus 3.33.2 · released 2026-06-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:24502)\n- **RHSA-2026:54435** · Red Hat · fixed in: Streams for Apache Kafka 3.2.1 · released 2026-08-12 · [advisory](https://access.redhat.com/errata/RHSA-2026:54435)\n- **Red Hat VEX** · Important · affected: OpenShift Serverless, Red Hat build of Apicurio Registry 2, Red Hat build of Apicurio Registry 3, Red Hat build of Debezium 3, Red Hat Build of Keycloak, Red Hat build of OptaPlanner 8, … · no fix planned: Red Hat build of Apicurio Registry 2, Red Hat build of Debezium 3, Red Hat Build of Keycloak, Red Hat Data Grid 8, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42584.json)\n- **RHSA-2026:65126** · Red Hat · fixed in: Red Hat OpenShift AI 2.25 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:65126)\n- **RHSA-2026:66545** · Red Hat · fixed in: Red Hat AMQ Broker 7.13.6 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66545)\n- **RHSA-2026:66488** · Red Hat · fixed in: Red Hat AMQ Broker 7.14.1 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66488)\n- **RHSA-2026:49701** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 8.1.7.GA · released 2026-08-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:49701)\n- **RHSA-2026:53645** · Red Hat · fixed in: Red Hat JBoss EAP 7.4 ELS for RHEL 8 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53645)\n- **RHSA-2026:53646** · Red Hat · fixed in: Red Hat JBoss EAP 7.4 ELS for RHEL 9 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53646)\n- **RHSA-2026:69459** · Red Hat · fixed in: AMQ Clients 2026.Q3 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69459)","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":40.2,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":201649,"id":"CVE-2026-42584","ts":1789399580701,"field":"exploit_available","old":"false","new":"true"},{"seq":200381,"id":"CVE-2026-42584","ts":1789397183552,"field":"exploit_available","old":"true","new":"false"},{"seq":198305,"id":"CVE-2026-42584","ts":1789391813306,"field":"exploit_available","old":"false","new":"true"},{"seq":196098,"id":"CVE-2026-42584","ts":1789383458181,"field":"exploit_available","old":"true","new":"false"},{"seq":195027,"id":"CVE-2026-42584","ts":1789380354603,"field":"exploit_available","old":"false","new":"true"},{"seq":193814,"id":"CVE-2026-42584","ts":1789378319706,"field":"exploit_available","old":"true","new":"false"},{"seq":192601,"id":"CVE-2026-42584","ts":1789376301806,"field":"exploit_available","old":"false","new":"true"},{"seq":191388,"id":"CVE-2026-42584","ts":1789373214030,"field":"exploit_available","old":"true","new":"false"},{"seq":190173,"id":"CVE-2026-42584","ts":1789369193992,"field":"exploit_available","old":"false","new":"true"},{"seq":188960,"id":"CVE-2026-42584","ts":1789368076289,"field":"exploit_available","old":"true","new":"false"},{"seq":187743,"id":"CVE-2026-42584","ts":1789365050120,"field":"exploit_available","old":"false","new":"true"},{"seq":186530,"id":"CVE-2026-42584","ts":1789363068971,"field":"exploit_available","old":"true","new":"false"},{"seq":185316,"id":"CVE-2026-42584","ts":1789361007401,"field":"exploit_available","old":"false","new":"true"},{"seq":184103,"id":"CVE-2026-42584","ts":1789357991905,"field":"exploit_available","old":"true","new":"false"},{"seq":182354,"id":"CVE-2026-42584","ts":1789354147358,"field":"exploit_available","old":"false","new":"true"},{"seq":181147,"id":"CVE-2026-42584","ts":1789352988223,"field":"exploit_available","old":"true","new":"false"},{"seq":179940,"id":"CVE-2026-42584","ts":1789350057019,"field":"exploit_available","old":"false","new":"true"},{"seq":178733,"id":"CVE-2026-42584","ts":1789347904804,"field":"exploit_available","old":"true","new":"false"},{"seq":177526,"id":"CVE-2026-42584","ts":1789346209811,"field":"exploit_available","old":"false","new":"true"},{"seq":176319,"id":"CVE-2026-42584","ts":1789342813477,"field":"exploit_available","old":"true","new":"false"},{"seq":175773,"id":"CVE-2026-42584","ts":1789338596538,"field":"exploit_available","old":"false","new":"true"},{"seq":175643,"id":"CVE-2026-42584","ts":1789338438767,"field":"exploit_available","old":"true","new":"false"},{"seq":174438,"id":"CVE-2026-42584","ts":1789334638290,"field":"exploit_available","old":"false","new":"true"},{"seq":173233,"id":"CVE-2026-42584","ts":1789333301697,"field":"exploit_available","old":"true","new":"false"},{"seq":172047,"id":"CVE-2026-42584","ts":1789330930489,"field":"exploit_available","old":"false","new":"true"},{"seq":170861,"id":"CVE-2026-42584","ts":1789328436094,"field":"exploit_available","old":"true","new":"false"},{"seq":169656,"id":"CVE-2026-42584","ts":1789326954213,"field":"exploit_available","old":"false","new":"true"},{"seq":168451,"id":"CVE-2026-42584","ts":1789323506411,"field":"exploit_available","old":"true","new":"false"},{"seq":167246,"id":"CVE-2026-42584","ts":1789319409586,"field":"exploit_available","old":"false","new":"true"},{"seq":166041,"id":"CVE-2026-42584","ts":1789318364378,"field":"exploit_available","old":"true","new":"false"},{"seq":164836,"id":"CVE-2026-42584","ts":1789315587460,"field":"exploit_available","old":"false","new":"true"},{"seq":163631,"id":"CVE-2026-42584","ts":1789313305828,"field":"exploit_available","old":"true","new":"false"},{"seq":162426,"id":"CVE-2026-42584","ts":1789311741270,"field":"exploit_available","old":"false","new":"true"},{"seq":161221,"id":"CVE-2026-42584","ts":1789308329488,"field":"exploit_available","old":"true","new":"false"},{"seq":160726,"id":"CVE-2026-42584","ts":1789304258148,"field":"exploit_available","old":"false","new":"true"},{"seq":158564,"id":"CVE-2026-42584","ts":1789299339120,"field":"exploit_available","old":"true","new":"false"},{"seq":157528,"id":"CVE-2026-42584","ts":1789296493649,"field":"exploit_available","old":"false","new":"true"},{"seq":156323,"id":"CVE-2026-42584","ts":1789294433442,"field":"exploit_available","old":"true","new":"false"},{"seq":155118,"id":"CVE-2026-42584","ts":1789292689876,"field":"exploit_available","old":"false","new":"true"},{"seq":153913,"id":"CVE-2026-42584","ts":1789289412350,"field":"exploit_available","old":"true","new":"false"},{"seq":152563,"id":"CVE-2026-42584","ts":1789281307389,"field":"exploit_available","old":"false","new":"true"},{"seq":148059,"id":"CVE-2026-42584","ts":1789270930254,"field":"exploit_available","old":"true","new":"false"},{"seq":146099,"id":"CVE-2026-42584","ts":1789269199069,"field":"exploit_available","old":"false","new":"true"},{"seq":145002,"id":"CVE-2026-42584"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