{"id":"CVE-2026-59902","title":"Netty is an asynchronous, event-driven network application framework","summary":"Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.sctp.SctpMessageCompletionHandler limits incomplete messages and fragment counts but not maxBufferedByt…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-770"],"vendor":"netty","product":"netty","affected":["netty < 4.1.137","netty >= 4.2.0, < 4.2.17"],"patched":["netty 4.2.17"],"published":"2026-08-17","updated":"2026-09-23","sourceUpdated":"2026-09-23T15:31:54.467","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59902","references":[{"url":"https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7","label":"security-advisories@github.com"},{"url":"https://github.com/netty/netty/pull/17213","label":"security-advisories@github.com"},{"url":"https://github.com/netty/netty/pull/17217","label":"security-advisories@github.com"},{"url":"https://github.com/netty/netty/releases/tag/netty-4.1.137.Final","label":"security-advisories@github.com"},{"url":"https://github.com/netty/netty/releases/tag/netty-4.2.17.Final","label":"security-advisories@github.com"},{"url":"https://github.com/netty/netty/security/advisories/GHSA-2qj4-mmr9-4v2f","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-2qj4-mmr9-4v2f"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59902.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-59902"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2517526"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-59902"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59902"},{"url":"https://access.redhat.com/errata/RHSA-2026:71675"}],"tags":["nvd","ghsa","maven","csaf","vex","red-hat"],"epss":0.00365,"epssPercentile":0.30217,"aliases":["GHSA-2qj4-mmr9-4v2f"],"ecosystem":"maven","ingestedAt":"2026-08-17T17:58:09.844Z","slug":"CVE-2026-59902","body":"## Overview\n\nNetty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.sctp.SctpMessageCompletionHandler limits incomplete messages and fragment counts but not maxBufferedBytes, allowing unauthenticated peers to exhaust memory with large SCTP fragments. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.\n\n## Affected\n\n- `netty < 4.1.137`\n- `netty >= 4.2.0, < 4.2.17`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `netty 4.2.17`\n\n## Package advisory (CVE-2026-59902)\n\nAffected packages:\n\n- `io.netty:netty-transport-sctp >= 4.2.0.Final, <= 4.2.16.Final`\n- `io.netty:netty-transport-sctp <= 4.1.136.Final`\n\nPatched in:\n\n- `io.netty:netty-transport-sctp 4.2.17.Final`\n- `io.netty:netty-transport-sctp 4.1.137.Final`\n\nSource: https://github.com/advisories/GHSA-2qj4-mmr9-4v2f\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7 · no fix planned: Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7, Red Hat Enterprise Linux AI (RHEL AI) 3 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59902.json)\n- **RHSA-2026:71675** · Red Hat · fixed in: Red Hat build of Apache Camel 4.18.4 for Spring Boot 3.5.16 · released 2026-09-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:71675)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}