CVE-2026-82067Network attack vector

Unauthenticated administrative access via case-sensitive configuration validation

Published Sep 8, 2026 · Updated Sep 8, 2026

Improper case handling in MongoDB Server allows remote attackers to gain administrative access when authorization stays disabled at startup. The configuration validator mishandles case distinctions during startup, causing the requested authorization state to be ignored and the disabled default retained. Network reachability to a deployment that starts in this state is sufficient for unauthenticated reads, writes, and administrative disruption; affected lines are 7.0.0 through 7.0.40, 8.0.0 through 8.0.29, and 8.3.0 through 8.3.8.

CVSS severity9.2
Critical
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper case handling in MongoDB Server allows remote attackers to gain administrative access when authorization stays disabled at startup. The configuration validator mishandles case distinctions during startup, causing the requested authorization state to be ignored and the disabled default retained. Network reachability to a deployment that starts in this state is sufficient for unauthenticated reads, writes, and administrative disruption; affected lines are 7.0.0 through 7.0.40, 8.0.0 through 8.0.29, and 8.3.0 through 8.3.8.

The record

CVE
CVE-2026-82067
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
MongoDB
Product
MongoDB Server
Classifications
CWE-178, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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=7.0.0 <7.0.41
  2. Affected versionversion=8.0.0 <8.0.30
  3. Affected versionversion=8.3.0 <8.3.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MongoDB · MongoDB Serverversion=7.0.0 <7.0.41; version=8.0.0 <8.0.30; version=8.3.0 <8.3.9

Published CVSS scores

9.2MongoDBCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1MongoDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-178Improper Handling of Case Sensitivity
T1190Exploit Public-Facing Application

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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