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CVE-2026-26933

Improper Validation of Array Index in Packetbeat Leading to Denial of Service

Published: Mar 19, 2026Updated: Mar 23, 2026 Sources: CVE List NVD BDUCWE-129
5.7MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 85.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:AAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-129

Affected Products

Elastic
commercial·USaka elastic.co, elasticsearch co.
Packetbeat
Databases
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Elastic NV
commercial·USaka elastic
PacketbeatOn-premWeb App
Enterprise Software / itsm-monitoring
elasticsearch
commercialaka elastic, elasticsearch service
packetbeatOn-prem
Databases / nosql

Exploitability

Official Patch Available

References

https://discuss.elastic.co/t/packetbeat-8-19-11-9-2-5-security-update-esa-2026-11/385533
discuss.elastic.co
https://github.com/elastic/beats
github.com
https://github.com/elastic/beats/commit/dec1b31111ec3500b82db21ba67dde5c914ee94d
github.com
and 3 more references View all →
News mentions
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