Vulnerability Details CVE-2026-9743
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 14.1%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-9743
-
cpe:2.3:a:mongodb:mongodb:8.0.0
-
cpe:2.3:a:mongodb:mongodb:8.0.1
-
cpe:2.3:a:mongodb:mongodb:8.0.10
-
cpe:2.3:a:mongodb:mongodb:8.0.11
-
cpe:2.3:a:mongodb:mongodb:8.0.12
-
cpe:2.3:a:mongodb:mongodb:8.0.13
-
cpe:2.3:a:mongodb:mongodb:8.0.14
-
cpe:2.3:a:mongodb:mongodb:8.0.15
-
cpe:2.3:a:mongodb:mongodb:8.0.16
-
cpe:2.3:a:mongodb:mongodb:8.0.17
-
cpe:2.3:a:mongodb:mongodb:8.0.18
-
cpe:2.3:a:mongodb:mongodb:8.0.19
-
cpe:2.3:a:mongodb:mongodb:8.0.2
-
cpe:2.3:a:mongodb:mongodb:8.0.20
-
cpe:2.3:a:mongodb:mongodb:8.0.21
-
cpe:2.3:a:mongodb:mongodb:8.0.3
-
cpe:2.3:a:mongodb:mongodb:8.0.4
-
cpe:2.3:a:mongodb:mongodb:8.0.5
-
cpe:2.3:a:mongodb:mongodb:8.0.6
-
cpe:2.3:a:mongodb:mongodb:8.0.7
-
cpe:2.3:a:mongodb:mongodb:8.0.8
-
cpe:2.3:a:mongodb:mongodb:8.0.9