CVE-2026-8063: CWE-476: NULL Pointer Dereference in MongoDB Inc. MongoDB Server
CVE-2026-8063 is a high-severity vulnerability in MongoDB Server versions 8.2.0 prior to 8.2.7. It allows an authenticated user to crash the mongod process by running $rankFusion or $scoreFusion aggregation stages with an empty pipeline on a view. The issue arises because the server attempts to read the first element of each stage's input pipeline array without checking if the array is empty, leading to a null pointer dereference and server crash.
AI Analysis
Technical Summary
This vulnerability involves a NULL pointer dereference (CWE-476) in MongoDB Server when resolving views that use $rankFusion or $scoreFusion aggregation stages. Specifically, the server inspects the aggregation pipeline to detect Atlas Search stages by reading the first element of each stage's input pipeline array. If the pipeline is empty, this results in a null pointer dereference and crashes the mongod process. The flaw affects MongoDB Server 8.2.0 up to but not including 8.2.7.
Potential Impact
An authenticated user can cause a denial of service by crashing the MongoDB server process. This disrupts database availability but does not directly indicate data corruption or unauthorized data access based on the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the affected versions are prior to 8.2.7, upgrading to version 8.2.7 or later (once confirmed by the vendor) is likely the recommended fix. Until then, avoid running $rankFusion or $scoreFusion with empty pipelines on views. Monitor official MongoDB advisories for updates and patches addressing this issue.
CVE-2026-8063: CWE-476: NULL Pointer Dereference in MongoDB Inc. MongoDB Server
Description
CVE-2026-8063 is a high-severity vulnerability in MongoDB Server versions 8.2.0 prior to 8.2.7. It allows an authenticated user to crash the mongod process by running $rankFusion or $scoreFusion aggregation stages with an empty pipeline on a view. The issue arises because the server attempts to read the first element of each stage's input pipeline array without checking if the array is empty, leading to a null pointer dereference and server crash.
CVSS v4.0
Score 7.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a NULL pointer dereference (CWE-476) in MongoDB Server when resolving views that use $rankFusion or $scoreFusion aggregation stages. Specifically, the server inspects the aggregation pipeline to detect Atlas Search stages by reading the first element of each stage's input pipeline array. If the pipeline is empty, this results in a null pointer dereference and crashes the mongod process. The flaw affects MongoDB Server 8.2.0 up to but not including 8.2.7.
Potential Impact
An authenticated user can cause a denial of service by crashing the MongoDB server process. This disrupts database availability but does not directly indicate data corruption or unauthorized data access based on the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the affected versions are prior to 8.2.7, upgrading to version 8.2.7 or later (once confirmed by the vendor) is likely the recommended fix. Until then, avoid running $rankFusion or $scoreFusion with empty pipelines on views. Monitor official MongoDB advisories for updates and patches addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-05-07T04:02:07.119Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fc24d8cbff5d86109abcd0
Added to database: 05/07/2026, 05:36:24 UTC
Last enriched: 05/14/2026, 10:52:27 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 223
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