An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Mongodb | — | Upgrade MongoDB to version 8.0.30Upgrade to the latest version of MongoDBUpgrade MongoDB to version 8.3.9Upgrade MongoDB to version 7.0.41 | Sep 23, 2026 | Sep 8, 2026 |
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