CVE-2026-50011

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/netty/netty/releases/tag/netty-4.1.135.Final	Release Notes
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final	Release Notes
https://github.com/netty/netty/security/advisories/GHSA-5w86-c3rq-vjj7	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:37390
https://access.redhat.com/errata/RHSA-2026:41951
https://access.redhat.com/errata/RHSA-2026:50085
https://access.redhat.com/errata/RHSA-2026:53644
https://access.redhat.com/errata/RHSA-2026:53645
https://access.redhat.com/errata/RHSA-2026:53646
https://access.redhat.com/security/cve/CVE-2026-50011
https://bugzilla.redhat.com/show_bug.cgi?id=2488413
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50011.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:netty:netty::::::::
	cpe:2.3:a:netty:netty::::::::

History

18 Sep 2026, 13:18

Type	Values Removed	Values Added
References	~~{'url': 'https://access.redhat.com/errata/RHSA-2026:53806', 'source': '0b0ca135-0b70-47e7-9f44-1890c2a1c46c'}~~	() https://access.redhat.com/errata/RHSA-2026:53645 - () https://access.redhat.com/errata/RHSA-2026:53646 -

Information

Published : 2026-06-12 16:16

Updated : 2026-09-18 13:18

NVD link : CVE-2026-50011

Mitre link : CVE-2026-50011

CVE.ORG link : CVE-2026-50011

JSON object : View

Products Affected

netty

netty

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-770

Allocation of Resources Without Limits or Throttling

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"https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:jboss_enterprise_application_platform_xp:6.0"], "vendor": "Red Hat", "product": "Red Hat JBoss Enterprise Application Platform 8.1", "versions": [{"status": "unaffected", "version": "codec-redis", "lessThan": "*", "versionType": "rpm"}], "packageName": "netty", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:jboss_fuse:7"], "vendor": "Red Hat", "product": "Red Hat Fuse 7", "packageName": "netty-codec-redis", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:jbosseapxp"], "vendor": "Red Hat", "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack", "packageName": "netty-codec-redis", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:red_hat_single_sign_on:7"], "vendor": "Red Hat", "product": "Red Hat Single Sign-On 7", "packageName": "netty-codec-redis", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}]}], "published": "2026-06-12T16:16:31.313", "references": [{"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/netty/netty/security/advisories/GHSA-5w86-c3rq-vjj7", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:37390", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://access.redhat.com/errata/RHSA-2026:41951", "source": 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"value": "CWE-400"}, {"lang": "en", "value": "CWE-770"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-18T13:18:32.410", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3097D962-A32D-4467-AAE7-F4CBA3A349D2", "versionEndExcluding": "4.1.135"}, {"criteria": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "413D4611-A46C-4BE4-AB2F-D86282F65984", "versionEndExcluding": "4.2.15", "versionStartIncluding": "4.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}