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CVE-2026-18694: CWE-125: Out-of-bounds Read in MongoDB MongoDB Server

0
High
VulnerabilityCVE-2026-18694cvecve-2026-18694cwe-125
Published: 08/11/2026 (08/11/2026, 18:42:43 UTC)
Source: CVE Database V5
Vendor/Project: MongoDB
Product: MongoDB Server

Description

An issue in MongoDB Server's geospatial query processing could allow an authenticated user with write privileges to cause certain malformed geometry data to be stored and later processed without proper validation. Subsequent queries against this data could then result in the server accessing memory outside its intended bounds. This could result in a server crash (denial of service) and may expose a limited amount of server process memory.

CVSS v4.0

Score 7.1high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
Low
Vuln. Integrity
None
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Affected software

GitHub Actionsmore threats →ai
mongodb/mongo
pkg:github/mongodb/mongo
Affected versions
=7.0=8.0=8.3.0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/11/2026, 19:28:21 UTC

Technical Analysis

This vulnerability (CWE-125) in MongoDB Server's geospatial query processing allows an authenticated user with write privileges to insert malformed geometry data that bypasses proper validation. Subsequent queries against this data can cause the server to perform out-of-bounds memory reads. The flaw can result in server crashes (denial of service) and may expose a limited amount of server process memory. The affected versions explicitly include 7.0, 8.0, and 8.3.0. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.

Potential Impact

Successful exploitation can cause the MongoDB Server to crash, resulting in denial of service. Additionally, a limited amount of server memory may be exposed due to out-of-bounds reads. The attacker must be authenticated with write privileges to exploit this vulnerability. No evidence of remote code execution or privilege escalation is indicated.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict write privileges to trusted users only and monitor for unusual geospatial query activity. No official fix or temporary workaround has been published at this time.

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Technical Details

Data Version
5.2
Assigner Short Name
mongodb
Date Reserved
2026-08-03T15:53:28.865Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a7b7422bf8831d539467f7b

Added to database: 08/11/2026, 19:12:34 UTC

Last enriched: 08/11/2026, 19:28:21 UTC

Last updated: 08/11/2026, 20:26:54 UTC

Views: 5

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