CVE-2026-78588 Allocation of Resources Without Limits or Throttling in Filebeat Leading to Denial of Service

Medium 6.5 Published 2 Sep 2026 Updated 2 Sep 2026

An attacker can cause a denial of service in Filebeat by sending crafted compressed requests to the HTTP ingestion endpoint, exhausting memory resources.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-78588?

CVE-2026-78588 is a medium-severity denial of service vulnerability in Elastic Filebeat, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Allocation of Resources Without Limits or Throttling (CWE-770) in Filebeat can lead to a denial of service via Excessive Allocation (CAPEC-130). An attacker able to reach the Filebeat HTTP ingestion endpoint could send specially crafted compressed requests that exhaust the memory resources of the Filebeat process.

Weakness: CWE-770

Which versions are affected by CVE-2026-78588?

It affects 1 product.

Products include Elastic Filebeat.

How do I fix CVE-2026-78588?

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-2026-78588 being exploited?

There is no known exploitation of CVE-2026-78588 in the wild and no public exploit code.

Sources

Also known as GHSA-qr96-485q-v8j7, MINI-69hx-v9r5-8fpp, MINI-m3wp-qcvf-37c9.