# CVE-2026-0529: Improper Validation of Array Index in Packetbeat Leading to Overflow Buffers

> CVE-2026-0529: Improper Validation of Array Index in Packetbeat Leading to Overflow Buffers. CVSS 6.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-0529
Last updated: 2026-06-17T10:10:53Z

- Published: 2026-01-14 10:09 UTC · Updated: 2026-06-17 10:10 UTC · Assigner: elastic
- CVSS: 6.5 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.23%, 13th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-129

## Description

Improper Validation of Array Index (CWE-129) in Packetbeat’s MongoDB protocol parser can allow an attacker to cause Overflow Buffers (CAPEC-100) through specially crafted network traffic. This requires an attacker to send a malformed payload to a monitored network interface where MongoDB protocol parsing is enabled.

## Affected vendors and products

- Elastic: Packetbeat

## Tracked companies

- [Elastic Cloud](https://rewindex.com/company/elastic-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-0529)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-0529)
- [https://discuss.elastic.co/t/packetbeat-8-19-10-9-1-10-9-2-4-security-update-esa-2026-02/384520](https://discuss.elastic.co/t/packetbeat-8-19-10-9-1-10-9-2-4-security-update-esa-2026-02/384520)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-0529 · Markdown: https://rewindex.com/cve/CVE-2026-0529.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-0529 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:56.656Z