Description
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.
Published: 2026-06-09
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Mon, 15 Jun 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Mongodb mongodb
CPEs cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
Vendors & Products Mongodb mongodb

Wed, 10 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 10 Jun 2026 01:30:00 +0000

Type Values Removed Values Added
First Time appeared Mongodb
Mongodb mongodb Server
Vendors & Products Mongodb
Mongodb mongodb Server

Tue, 09 Jun 2026 22:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Aggregation sub-pipeline null dereference may allow DoS via crafted getMore
Weaknesses CWE-476
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Mongodb Mongodb Mongodb Server
cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-06-10T13:50:48.290Z

Reserved: 2026-05-27T17:34:45.641Z

Link: CVE-2026-9743

cve-icon Vulnrichment

Updated: 2026-06-10T13:50:43.644Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-09T23:17:03.853

Modified: 2026-06-15T16:56:21.370

Link: CVE-2026-9743

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T01:15:18Z

Weaknesses