CVE-2026-8202

Post-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operators

State: Published
Severity: 5.3 Medium
Published: May 13, 2026
Updated: May 13, 2026
Reserved: May 8, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	mongodb
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	mongodb

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
MongoDB ServerMongoDB, Inc.	7.0 to before 7.0.34Affected 8.0 to before 8.0.23Affected 8.2 to before 8.2.9Affected 8.3 to before 8.3.2Affected

References

https://jira.mongodb.org/browse/SERVER-120668issue-tracking

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