CVE-2026-93572 Io.netty/netty-codec-redis: netty: redisarrayaggregator nested resp headers multiply patched preallocation limits
Remote attackers can cause heap memory exhaustion and denial of service in applications using Netty's Redis decoder by sending crafted nested RESP array headers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93572?
CVE-2026-93572 is a high-severity denial of service vulnerability in Red Hat Fuse 7, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-770
Which versions are affected by CVE-2026-93572?
How do I fix CVE-2026-93572?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-93572 being exploited?
There is no known exploitation of CVE-2026-93572 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-93572, GHSA-jmx3-m859-mrgc, UBUNTU-CVE-2026-93572.