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

Summary

### Summary 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. ### Details The aggregator starts a new aggregation level when it receives an ArrayHeaderRedisMessage. For positive lengths it…

Product

maven: io.netty:netty-codec-redis

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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