Medium severity · published May 13, 2026
CVE-2026-8202
Post-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operators
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
7.0.0 before 7.0.34; 8.0.0 before 8.0.23; 8.2.0 before 8.2.9; 8.3.0 before 8.3.2 · source: NVD
MS
MongoDB Server · MongoDB, Inc.
7.0 before 7.0.34; 8.0 before 8.0.23; 8.2 before 8.2.9; 8.3 before 8.3.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8202
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-8202
Issue Tracking
https://jira.mongodb.org/browse/SERVER-120668
More from MongoDB
9.9
CVE-2019-10758
MongoDB mongo-express Remote Code Execution Vulnerability
7.5
CVE-2025-14847
Zlib compressed protocol header length confusion may allow memory read
9.8
CVE-2026-19001
MongoDB BI Connector ODBC driver may write outside an allocated buffer when handling oversized catalog object names
9.8
CVE-2025-3085
A MongoDB server under specific conditions running on Linux with TLS and CRL revocation status checking enabled, fails to check the revocation status of the intermediate…
9.8
CVE-2024-8654
MongoDB Server may access non-initialized region of memory leading to unexpected behaviour