An unauthenticated remote client can cause excessive CPU consumption on a MongoDB server by sending a specific combination of parameters to the awaitable hello command in exhaust mode. The server's handling of this combination results in a response loop that bypasses normal throttling, allowing a small number of connections to degrade server availability.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://jira.mongodb.org/browse/SERVER-128517 Vendor Advisory, Issue Tracking, Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.9 · mongodbNVD modified 2026-10-24 13:10
Affected (CPE criteria) 1
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
References 1
- https://jira.mongodb.org/browse/SERVER-128517 Vendor Advisory, Issue Tracking, Patch