CVE-2026-9747
Crafted cross-shard merge aggregation crashes MongoDB Server
CVE-2026-9747 is fixed in MongoDB on 1 platform by MongoDB 8.3.3 (version 8.3.3), released May 28, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.1
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0027
19th percentile
Adding fromRouter:true and runtimeConstants.userRoles could cause aggregations to crash mongodb server.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| MongoDB | 8.3.3 | MongoDB 8.3.3 | May 28, 2026 |
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