CVE-2026-26933
Medium
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.
SeverityMedium
CVSS5.7
Exploit probability—
Product
Elasticsearch Packetbeat
PublishedMar 19, 2026
First seenMar 19, 2026
Weakness typeCWE-129CWE-129
How to fix
Update
- elasticsearch packetbeat8.19.11, 9.2.5 or later
- github.com/elastic/beats/v77.0.0-alpha2.0.20260126223743-dec1b31111ec or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elasticsearch packetbeat | 8.0.0 ≤ v < 8.19.11, 9.0.0 ≤ v < 9.2.5 | 8.19.11, 9.2.5 |
| github.com/elastic/beats/v7Go | v < 7.0.0-alpha2.0.20260126223743-dec1b31111ec | 7.0.0-alpha2.0.20260126223743-dec1b31111ec |
| github.com/elastic/beatsGo | No range specified | — |
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