CVE-2026-18701: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in MongoDB MongoDB Server
An issue in MongoDB Server's query subsystem could allow an authenticated user with read privileges to cause the server process to terminate unexpectedly by submitting a specially formed query filter. This could result in a denial of service.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-18701) involves a type confusion issue (CWE-843) in the MongoDB Server query subsystem. An authenticated user with read privileges can exploit this flaw by submitting a specially formed query filter, causing the server process to crash unexpectedly. The impact is a denial of service against the MongoDB Server. The vulnerability affects specific versions: 7.0, 8.0, and 8.3.0. No known exploits in the wild have been reported, and no official patch or remediation level has been published by MongoDB as of the data provided.
Potential Impact
An attacker with authenticated read access can cause the MongoDB Server process to terminate unexpectedly, resulting in denial of service. This disrupts availability but does not indicate direct data compromise or privilege escalation based on the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting read access to trusted users only and monitor for unusual query patterns that could trigger this issue.
CVE-2026-18701: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in MongoDB MongoDB Server
Description
An issue in MongoDB Server's query subsystem could allow an authenticated user with read privileges to cause the server process to terminate unexpectedly by submitting a specially formed query filter. This could result in a denial of service.
CVSS v4.0
Score 7.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-18701) involves a type confusion issue (CWE-843) in the MongoDB Server query subsystem. An authenticated user with read privileges can exploit this flaw by submitting a specially formed query filter, causing the server process to crash unexpectedly. The impact is a denial of service against the MongoDB Server. The vulnerability affects specific versions: 7.0, 8.0, and 8.3.0. No known exploits in the wild have been reported, and no official patch or remediation level has been published by MongoDB as of the data provided.
Potential Impact
An attacker with authenticated read access can cause the MongoDB Server process to terminate unexpectedly, resulting in denial of service. This disrupts availability but does not indicate direct data compromise or privilege escalation based on the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting read access to trusted users only and monitor for unusual query patterns that could trigger this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-08-03T15:53:39.501Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7b7424bf8831d539467fb8
Added to database: 08/11/2026, 19:12:36 UTC
Last enriched: 08/11/2026, 19:26:58 UTC
Last updated: 08/12/2026, 03:28:19 UTC
Views: 4
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