CVE-2026-8202 PUBLISHED

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

Assigner: mongodb
Reserved: 08.05.2026 Published: 13.05.2026 Updated: 13.05.2026

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.

CVSS Vector: 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
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS Score: 4.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	MongoDB, Inc.
Product	MongoDB Server
Versions	Default: unaffected affected from 7.0 to 7.0.34 (excl.) affected from 8.0 to 8.0.23 (excl.) affected from 8.2 to 8.2.9 (excl.) affected from 8.3 to 8.3.2 (excl.)

References

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

Problem Types

CWE-770: Allocation of Resources Without Limits or Throttling CWE