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CVE-2026-50011

HighPublished

Netty has unbounded pre-allocation in RedisArrayAggregator from RESP array length

Published: Jun 12, 2026
Updated: Sep 18, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 8, 2026

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 39.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

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 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.

Sources

secveri-cve-2026-50011-positivePoC
Proof-of-concept exploit for CVE-2026-50011, demonstrating the vulnerability and enabling security testing and validation.
secveri-cve-2026-50011-negativeExploit
Repository dedicated to CVE-2026-50011, providing analysis and potential exploitation details for the specified vulnerability.

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