CVE-2026-9747 HIGH

CVE-2026-9747: Crafted cross-shard merge aggregation crashes MongoDB Server

Vendor Mongodb
Product MongoDB Server
Weakness CWE-617
Published June 9, 2026
Last update June 10, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

Adding fromRouter:true and runtimeConstants.userRoles could cause aggregations to crash mongodb server.

Key dates

02Disclosure timeline

June 9, 2026 CVE published
June 10, 2026 Record updated