What is CVE-2026-26933?

CVE-2026-26933 is a medium-severity vulnerability in Elastic Packetbeat, classified under Improper Validation of Array Index. CVSS score: 5.7/10. Published 2026-03-19.

How severe is CVE-2026-26933?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Vulnerability in Elastic Packetbeat

CVE-2026-26933

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…

EPSS: 0.000 (0.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Elastic Packetbeat — versions 9.0.0, 8.0.0

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

discuss.elastic.co/t/packetbeat-8-19-11-9-2-5-security-update-esa-2026-11/385533

Frequently asked questions

What is CVE-2026-26933?: CVE-2026-26933 is a medium-severity vulnerability in Elastic Packetbeat, classified under Improper Validation of Array Index. CVSS score: 5.7/10. Published 2026-03-19.
How severe is CVE-2026-26933?: Medium severity. CVSS v3 base score is 5.7 out of 10.