Elastic Beats packetbeat 8.0.x < 8.19.11 / 9.0.x < 9.2.5 DoS (ESA-2026-11)

medium Nessus Plugin ID 303927

Synopsis

Elastic Beats packetbeat installed on the remote Windows host is affected by a denial of service vulnerability.

Description

The version of Elastic Beats packetbeat installed on the remote host is 8.0.x prior to 8.19.11, 9.0.x prior to 9.2.5. It is, therefore, affected by a denial of service vulnerability.

- Improper Validation of Array Index (CWE-129) in multiple protocol parser components in Packetbeat can lead Denial of Service via Input Data Manipulation (CAPEC-153). An attacker with the ability to send specially crafted, malformed network packets to a monitored network interface can trigger out-of-bounds read operations, resulting in application crashes or resource exhaustion. This requires the attacker to be positioned on the same network segment as the Packetbeat deployment or to control traffic routed to monitored interfaces. (CVE-2026-26933)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Elastic Beats packetbeat version 8.19.11, 9.2.5 or later.

Plugin Details

Severity: Medium

ID: 303927

File Name: elastic_beats_packetbeat_ESA-2026-11.nasl

Version: 1.1

Type: local

Agent: windows

Family: Windows

Published: 3/27/2026

Updated: 3/27/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v3

Risk Factor: Medium

Base Score: 5.7

Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS Score Source: CVE-2026-26933

Vulnerability Information

CPE: x-cpe:/a:elastic:beats_packetbeat

Required KB Items: SMB/Registry/Enumerated, installed_sw/Beats packetbeat

Patch Publication Date: 3/19/2026

Vulnerability Publication Date: 3/19/2026

Reference Information

CVE: CVE-2026-26933

IAVA: 2026-A-0265

Detections

Analytics