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Vulnerability · Published Jun 11, 2026 · Assigned by GitHub_M

CVE-2026-44250Netty: Memory Exhaustion in RedisArrayAggregator due to Deeply Nested Arrays

High 7.5

In plain English

A high-severity uncontrolled resource consumption in netty from netty. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 59.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Netty is a network application framework for development of protocol servers and clients. In netty-codec-redis prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can cause DoS by sending a crafted Redis payload with deeply nested arrays. This forces the server to allocate a massive number of state objects and collections, leading to memory exhaustion and an OutOfMemoryError. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12nettyno fix listedDEBIAN-CVE-2026-44250
Debian:13nettyno fix listedDEBIAN-CVE-2026-44250
Debian:14nettyno fix listedDEBIAN-CVE-2026-44250
Mavenio.netty:netty-codec-redis4.1.135.FinalGHSA-3244-j874-rhc2
Mavenio.netty:netty-codec-redis4.2.15.FinalGHSA-3244-j874-rhc2
Ubuntu:25.10nettyno fix listedUBUNTU-CVE-2026-44250
Ubuntu:26.10nettyno fix listedUBUNTU-CVE-2026-44250

Affected products (as reported)

VendorProductVersions
netty netty >= 4.2.0.Final, < 4.2.15.Final< 4.1.135.Final

Weakness: CWE-400, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References