# CVE-2026-8053: FlatBSON Duplicate Field Index Drift

> CVE-2026-8053: FlatBSON Duplicate Field Index Drift. CVSS 8.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-8053
Last updated: 2026-06-17T11:03:26Z

- Published: 2026-05-12 23:59 UTC · Updated: 2026-06-17 11:03 UTC · Assigner: mongodb
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 0.66%, 51th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-787

## Description

An issue in MongoDB Server's time-series collection implementation allows an authenticated user with database write privileges to trigger an out-of-bounds memory write in the mongod process. The issue results from an inconsistency in the internal field-name-to-index mapping within the time-series bucket catalog. Under certain conditions this can result in arbitrary code execution. This issue impacts MongoDB Server v5.0 versions prior to 5.0.33, v6.0 versions prior to 6.0.28, v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

## Affected vendors and products

- MongoDB, Inc.: MongoDB Server

## Tracked companies

- [MongoDB Atlas](https://rewindex.com/company/mongodb-atlas.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-8053)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-8053)
- [https://jira.mongodb.org/browse/SERVER-126021](https://jira.mongodb.org/browse/SERVER-126021)

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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-2026-8053 · Markdown: https://rewindex.com/cve/CVE-2026-8053.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-8053 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:13:24.916Z