# CVE-2026-8202: Post-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operators

> CVE-2026-8202: Post-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operators. CVSS 4.3 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-8202
Last updated: 2026-06-17T11:03:37Z

- Published: 2026-05-13 00:19 UTC · Updated: 2026-06-17 11:03 UTC · Assigner: mongodb
- CVSS: 4.3 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- EPSS: 0.26%, 18th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-770

## Description

Using a densely populated chars mask and a large input string in the MongoDB aggregation operators $trim, $ltrim, and $rtrim, an authenticated user with aggregation permissions can pin CPU utilization at 100% for an extended period of time. This issue impacts MongoDB Server 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-2026-8202)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-8202)
- [https://jira.mongodb.org/browse/SERVER-120668](https://jira.mongodb.org/browse/SERVER-120668)

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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-2026-8202 · Markdown: https://rewindex.com/cve/CVE-2026-8202.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-8202 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:45.328Z