CVE-2026-26932 Improper Validation of Array Index in Packetbeat Leading to Denial of Service

Medium 5.7 Published 26 Feb 2026 Updated 26 Feb 2026

An attacker can cause a denial of service in Packetbeat by sending crafted packets to the PostgreSQL protocol parser, requiring explicit configuration.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-26932?

CVE-2026-26932 is a medium-severity denial of service vulnerability in Elastic Packetbeat, published on 26 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper Validation of Array Index (CWE-129) in the PostgreSQL protocol parser in Packetbeat can lead Denial of Service via Input Data Manipulation (CAPEC-153). An attacker can send a specially crafted packet causing a Go runtime panic that terminates the Packetbeat process. This vulnerability requires the pgsql protocol to be explicitly enabled and configured to monitor traffic on the targeted port.

Weakness: CWE-129

Which versions are affected by CVE-2026-26932?

It affects 1 product.

Products include Elasticsearch Packetbeat.

How do I fix CVE-2026-26932?

No fix has been published for CVE-2026-26932 yet. Limit exposure of the affected software until one is available.

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-2026-26932 being exploited?

There is no known exploitation of CVE-2026-26932 in the wild and no public exploit code.

Sources

Also known as GHSA-fg9r-q7mv-mcrw.