PT-2026-26323 · Elastic · Packetbeat

Published 2026-03-19 · Updated 2026-03-19 · CVE-2026-26933

Mitre

CVSS v3.1

5.7

Medium

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

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.

Fix

Improper Validation of Array Index

Weakness Enumeration

CWE-129

Related Identifiers

CVE-2026-26933

Affected Products

Packetbeat

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-26933 · Security Note
• https://discuss.elastic.co/t/packetbeat-8-19-11-9-2-5-security-update-esa-2026-11/385533 · Note