Vulnerability Report

CVE-2026-26933

Title: Packetbeat DoS via Improper Array Index Validation

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2026-26933.

CWE Category CWE-129

Published Date Mar 19, 2026

Modified Date Mar 23, 2026

Exploit Status Not Found

Score 5.7 CVSS v3.1

Exploit Probability (EPSS)

0.24%

Vulnerability Summary

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 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.

Impacted Vendors

elasticsearch 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

5.7

Attack Vector

ADJACENT_NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-26933 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

March 23, 2026 MODIFIED

Vulnerability data updated via NVD.

March 23, 2026 MODIFIED

Vulnerability data updated via NVD.

March 20, 2026 MODIFIED

Vulnerability data updated via NVD.

March 19, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector ADJACENT_NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.