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MongoDB Replica Set Oplog Fetching Vulnerability Leading to Server Crash

Vulnerability

A vulnerability exists in MongoDB replica sets where inserting certain large documents can prevent secondary nodes from fetching the oplog from the primary. This disruption can stall replication within the replica set, potentially leading to a server crash.

Impact

Exploitation of this vulnerability can cause replication to stall within the replica set, leading to a server crash.

Remediation

Users can upgrade to MongoDB versions 8.0.18 or 7.0.29 to address this vulnerability.

Added: Feb 10, 2026, 9:22 PM
Updated: Feb 11, 2026, 1:30 AM

Vulnerability Rating

Custom Algorithm
spread
6.8
impact
2.5
exploitability
4.5
remediation
7.7
relevance
2.8
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.