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OpenAdvisories
Medium · 5.7 CVE-2026-26933 EUVD-2026-13142GHSA-27qj-9gvp-8rh9GO-2026-4789

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

Published Mar 19, 2026 · Updated Mar 19, 2026 · Assigned by elastic

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.

Affected products

VendorProductAffectedFixed
Elastic Packetbeat 9.0.0 – ≤ 9.2.4, 8.0.0 – ≤ 8.19.10 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/elastic/beats all versions — GO-2026-4789
Go github.com/elastic/beats/v7 < 7.0.0-alpha2.0.20260126223743-dec1b31111ec 7.0.0-alpha2.0.20260126223743-dec1b31111ec GHSA-27qj-9gvp-8rh9

Advisories 1

References