CVE-2026-50011: Netty: Unbounded pre-allocation in RedisArrayAggregator from RESP array length

June 15, 2026

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.

References

github.com/advisories/GHSA-5w86-c3rq-vjj7
github.com/netty/netty/releases/tag/netty-4.1.135.Final
github.com/netty/netty/releases/tag/netty-4.2.15.Final
github.com/netty/netty/security/advisories/GHSA-5w86-c3rq-vjj7
nvd.nist.gov/vuln/detail/CVE-2026-50011

Code Behaviors & Features

Detect and mitigate CVE-2026-50011 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →