CVE-2026-114649 MongoDB CVE debrief

Who should care

Defenders responsible for MongoDB deployments using the C# Driver should assess exposure and verify configurations to prevent unauthorized database operations. This includes reviewing certificate management and authentication mechanisms, monitoring database operations for suspicious activity, and ensuring proper compensating controls are in place for exposed systems.

Why it matters

CVE-2026-114649 allows unauthorized database operations in MongoDB C# Driver via TLS client certificate sharing, impacting data confidentiality and integrity.

• Potential unauthorized database operations under another user's identity.
• Possible data confidentiality and integrity impacts for affected users.
• Requires verification of MongoDB C# Driver versions and configurations.
• Defenders should prioritize certificate management and authentication mechanisms.

Technical summary

The MongoDB C# Driver compares TLS client certificates by issuer and serial number only, allowing a user with a certificate copying another user's issuer and serial number to access database operations under the other user's identity. This vulnerability impacts MongoDB deployments using the C# Driver, particularly in scenarios where clients are created from certificates supplied by different users. Defenders should prioritize verifying MongoDB C# Driver versions and configurations to prevent unauthorized database operations.

Defensive priority

Defenders should prioritize verifying MongoDB C# Driver versions and configurations to prevent unauthorized database operations.

Recommended defensive actions

• Verify MongoDB C# Driver versions and configurations to prevent unauthorized database operations.
• Implement proper certificate management and authentication mechanisms.
• Monitor database operations for suspicious activity.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in MongoDB C# Driver. Specific version information and remediation steps are limited, but defenders can verify MongoDB C# Driver versions and configurations to prevent unauthorized database operations. The issue requires proper certificate management and authentication mechanisms. Evidence is based on official CVE Program records and NIST NVD detail pages.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.