CVE-2025-6712: MongoDB Server DOS Vulnerability

CVE-2025-6712 Overview

CVE-2025-6712 is a resource consumption vulnerability [CWE-400] in MongoDB Server that can lead to server crashes. The flaw stems from inefficient memory management tied to internal operations that persist longer than expected. When these processes linger, memory consumption grows, degrading server stability and availability.

The issue affects MongoDB Server v8.0 releases prior to 8.0.10. An authenticated attacker on the network can trigger the condition, causing availability impact to the database service without affecting confidentiality or integrity.

Critical Impact
Authenticated remote attackers can exhaust memory on MongoDB Server instances, leading to server crashes and database service outages.

Affected Products

MongoDB Server v8.0 versions prior to 8.0.10

Discovery Timeline

2025-07-07 - CVE-2025-6712 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-6712

Vulnerability Analysis

CVE-2025-6712 is a denial-of-service condition caused by uncontrolled resource consumption inside MongoDB Server. Internal operations fail to release memory within expected lifetimes. As these operations accumulate, resident memory grows until the server process becomes unstable or crashes.

The vulnerability requires network access and valid low-privilege credentials. No user interaction is needed, and exploitation does not disclose data or alter stored records. The impact is limited to availability of the database service.

Root Cause

The root cause is inefficient memory management linked to specific internal processes that persist longer than anticipated. When these processes do not terminate on schedule, their allocated memory is not reclaimed. Repeated or sustained invocation of the affected code paths amplifies memory pressure until the mongod process is terminated by the operating system or crashes on its own.

MongoDB tracks remediation details in the vendor advisory MongoDB Jira Issue SERVER-106751.

Attack Vector

The attack vector is network-based with low attack complexity. An attacker with valid low-privilege credentials to the MongoDB instance submits operations that trigger the inefficient memory path. Sustained activity drives memory usage above sustainable limits, culminating in a server crash and loss of database availability.

No public proof-of-concept, exploit code, or CISA KEV listing exists for this CVE at the time of publication. Technical specifics of the triggering operations are not disclosed in the public advisory. See the MongoDB Jira Issue SERVER-106751 for vendor-tracked details.

Detection Methods for CVE-2025-6712

Indicators of Compromise

Unexpected growth in resident set size (RSS) of the mongod process without a corresponding increase in workload.
Repeated mongod process restarts or crashes with out-of-memory (OOM) kill events in system logs.
Elevated memory metrics in MongoDB serverStatus output, particularly mem.resident and tcmalloc counters, trending upward over time.

Detection Strategies

Baseline MongoDB memory usage per instance and alert on deviation beyond a defined threshold.
Correlate authentication logs with memory-consumption spikes to identify suspicious client sessions preceding resource exhaustion.
Monitor the host operating system for OOM-killer events targeting mongod and review preceding database activity.

Monitoring Recommendations

Enable MongoDB diagnostic data capture (FTDC) to retain memory and operation metrics for forensic review.
Ingest MongoDB logs, host metrics, and OS logs into a centralized SIEM for cross-source correlation of availability incidents.
Alert on long-running internal operations and sessions that persist beyond operational norms.

How to Mitigate CVE-2025-6712

Immediate Actions Required

Upgrade MongoDB Server v8.0 deployments to version 8.0.10 or later.
Audit database user accounts and revoke credentials that are not required for current operations.
Restrict network access to MongoDB listeners so only trusted application hosts can reach the service.

Patch Information

MongoDB has resolved the issue in MongoDB Server 8.0.10. Operators running any v8.0 release prior to 8.0.10 should plan an upgrade. Refer to MongoDB Jira Issue SERVER-106751 for the vendor remediation record.

Workarounds

Enforce least-privilege authentication and remove unused roles to limit the attacker surface.
Place MongoDB behind network controls, such as firewall rules or private subnets, to block untrusted network reachability.
Configure resource limits at the operating system level and deploy process supervision to restart mongod after a crash while remediation is scheduled.

bash

# Verify the running MongoDB Server version
mongosh --quiet --eval 'db.version()'

# Example: upgrade on a Debian/Ubuntu host once repositories are configured
sudo apt-get update
sudo apt-get install -y mongodb-org=8.0.10 mongodb-org-server=8.0.10

# Restart the service after upgrade
sudo systemctl restart mongod