CVE-2026-8202Network attack vector

Authenticated CPU exhaustion via oversized trim masks

Published May 13, 2026 · Updated May 13, 2026

Resource exhaustion in affected MongoDB Server releases allows remote authenticated users to exhaust CPU capacity via aggregation queries. The $trim, $ltrim, and $rtrim operators process a large input against a densely populated, oversized chars mask without an effective size bound, pinning CPU utilization at 100% for an extended period. Exploitation requires aggregation permissions; affected lines are 7.0 before 7.0.34, 8.0 before 8.0.23, 8.2 before 8.2.9, and 8.3 before 8.3.2.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected MongoDB Server releases allows remote authenticated users to exhaust CPU capacity via aggregation queries. The $trim, $ltrim, and $rtrim operators process a large input against a densely populated, oversized chars mask without an effective size bound, pinning CPU utilization at 100% for an extended period. Exploitation requires aggregation permissions; affected lines are 7.0 before 7.0.34, 8.0 before 8.0.23, 8.2 before 8.2.9, and 8.3 before 8.3.2.

The record

CVE
CVE-2026-8202
Published
May 13, 2026
Updated
May 13, 2026
Vendor
MongoDB
Product
MongoDB Server
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0 <7.0.34
  2. Affected versionversion=8.0 <8.0.23
  3. Affected versionversion=8.2 <8.2.9
  4. Affected versionversion=8.3 <8.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MongoDB · MongoDB Serverversion=7.0 <7.0.34; version=8.0 <8.0.23; version=8.2 <8.2.9; version=8.3 <8.3.2

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.3MongoDB, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.3MongoDB, Inc.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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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