CVE-2026-9743
Medium · 6.5CVSS
6.5
EPSS
0.5%
Published
Jun 9, 2026
CISA due date
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The record
In MongoDB Server 8.0, an aggregation stage can leave its _subPipeline field null during processing of certain pipelines. If a getMore is subsequently issued on the same cursor, the server may dereference this null sub-pipeline when reattaching to the operation context, accessing an invalid address and crashing the process. This issue allows an authenticated user who can run aggregation pipelines to cause a denial of service by issuing a specially crafted aggregation followed by getMore on affected versions.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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