--- id: CVE-2026-50011 title: >- Netty is a network application framework for development of protocol servers and clients summary: >- Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, RedisArrayAggregator pre-allocates ArrayList with initial capacity equal to the RESP array elemen… 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 < 4.1.135 - 'netty >= 4.2.0, < 4.2.15' patched: - netty 4.2.15 published: '2026-06-12' updated: '2026-09-18' sourceUpdated: '2026-09-18T13:18:32.410' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50011' references: - url: 'https://github.com/netty/netty/releases/tag/netty-4.1.135.Final' label: security-advisories@github.com - url: 'https://github.com/netty/netty/releases/tag/netty-4.2.15.Final' label: security-advisories@github.com - url: 'https://github.com/netty/netty/security/advisories/GHSA-5w86-c3rq-vjj7' label: security-advisories@github.com - url: 'https://access.redhat.com/errata/RHSA-2026:37390' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:41951' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:50085' 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/security/cve/CVE-2026-50011' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2488413' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50011.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-2026-50011' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50011' - url: 'https://github.com/advisories/GHSA-5w86-c3rq-vjj7' tags: - nvd - exploit-available - cve.org - csaf - vex - red-hat - ghsa - maven epss: 0.00849 epssPercentile: 0.56362 exploits: github: 2 githubRepos: - 'https://github.com/bibotai/secveri-cve-2026-50011-positive' - 'https://github.com/bibotai/secveri-cve-2026-50011-negative' checkedAt: '2026-09-26T09:05:47.003Z' exploitAvailable: true aliases: - GHSA-5w86-c3rq-vjj7 ecosystem: maven ssvc: exploitation: none automatable: 'yes' technicalImpact: partial timestamp: '2026-06-12T15:59:06.922761Z' ingestedAt: '2026-07-07T15:41:58.407Z' --- ## Overview Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, RedisArrayAggregator pre-allocates ArrayList with initial capacity equal to the RESP array element count declared in an array header. That count is taken from the wire before the corresponding child messages exist. A small malicious header can claim a huge initial capacity. Versions 4.1.135.Final and 4.2.15.Final patch the issue. ## Affected - `netty < 4.1.135` - `netty >= 4.2.0, < 4.2.15` ## Remediation Upgrade past the affected range: - `netty 4.2.15` ## Package advisory (CVE-2026-50011) Affected packages: - `io.netty:netty-codec-redis >= 4.2.0.Final, <= 4.2.14.Final` - `io.netty:netty-codec-redis <= 4.1.134.Final` Patched in: - `io.netty:netty-codec-redis 4.2.15.Final` - `io.netty:netty-codec-redis 4.1.135.Final` Source: https://github.com/advisories/GHSA-5w86-c3rq-vjj7 ## Vendor advisories - **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) - **RHSA-2026:41951** · Red Hat · fixed in: Red Hat Data Grid 8.6.2 · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41951) - **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) - **RHSA-2026:50085** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 8.1 · released 2026-08-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:50085) - **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) - **Red Hat VEX** · Important · affected: Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform Expansion Pack · no fix planned: Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform Expansion Pack · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50011.json) - **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) - **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)