An authenticated user can crash mongod when running $rankFusion or $scoreFusion with an empty pipeline on a view.
When resolving a view, the server inspects the aggregation pipeline to determine whether it begins with an Atlas Search stage. For $rankFusion and $scoreFusion, this inspection reads the first element on each stage’s input pipeline array without first verifying that the array is non-empty. Supplying an empty pipeline causes a null pointer dereference and crashes the server.
This issue affects MongoDB Server 8.2 versions prior to 8.2.7.
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://jira.mongodb.org/browse/SERVER-121851 |
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History
Thu, 07 May 2026 13:15:00 +0000
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Thu, 07 May 2026 05:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | An authenticated user can crash mongod when running $rankFusion or $scoreFusion with an empty pipeline on a view. When resolving a view, the server inspects the aggregation pipeline to determine whether it begins with an Atlas Search stage. For $rankFusion and $scoreFusion, this inspection reads the first element on each stage’s input pipeline array without first verifying that the array is non-empty. Supplying an empty pipeline causes a null pointer dereference and crashes the server. This issue affects MongoDB Server 8.2 versions prior to 8.2.7. | |
| Title | Post-auth null pointer dereference when aggregating against a view with empty search pipeline | |
| Weaknesses | CWE-476 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: mongodb
Published:
Updated: 2026-05-07T12:58:36.281Z
Reserved: 2026-05-07T04:02:07.119Z
Link: CVE-2026-8063
Updated: 2026-05-07T12:58:32.585Z
Status : Received
Published: 2026-05-07T06:16:05.723
Modified: 2026-05-07T06:16:05.723
Link: CVE-2026-8063
No data.
OpenCVE Enrichment
Updated: 2026-05-07T06:30:06Z