# CVE-2026-18698: Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections via the validate Command

> CVE-2026-18698: Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections via the validate Command. CVSS 5.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-18698
Last updated: 2026-10-23T21:10:00Z

- Published: 2026-08-11 18:47 UTC · Updated: 2026-10-23 21:10 UTC · Assigner: mongodb
- CVSS: 5.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- EPSS: 0.24%, 15th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-863

## Description

An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that should require more specific privileges. This could result in exposure of collection metadata and, on certain deployment configurations, unauthorized modification of system collection data.

## Affected vendors and products

- MongoDB: 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-2026-18698)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-18698)
- [https://jira.mongodb.org/browse/SERVER-130481](https://jira.mongodb.org/browse/SERVER-130481)

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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-2026-18698 · Markdown: https://rewindex.com/cve/CVE-2026-18698.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-18698 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:00:09.511Z