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.

Database specific

{
    "cna_assigner": "elastic",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "9.0.0"
                },
                {
                    "last_affected": "9.2.4"
                },
                {
                    "introduced": "8.0.0"
                },
                {
                    "last_affected": "8.19.10"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-129"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26933.json"
}

References

Affected packages

Git / github.com/elastic/beats

Affected ranges

Type

GIT

Repo

https://github.com/elastic/beats

Events

Introduced

2ab3a7334016f570e0bfc7e9a577a35a22e02df5

Fixed

18eaf5054451b6c86268efd4eb50517c26471e1f

Introduced

42a721c925857c0d1f4160c977eb5f188e46d425

Fixed

090edf6777335b72756841fc32203573a0cc1073

Database specific

{
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.19.11"
        },
        {
            "introduced": "9.0.0"
        },
        {
            "fixed": "9.2.5"
        }
    ],
    "cpe": "cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:*"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26933.json"