CVE-2026-77586 MongoDB CVE debrief

Who should care

Defenders and administrators of MongoDB Connector for BI, especially those with users having write permissions to MongoDB collections, should assess exposure and prioritize remediation.

Why it matters

This vulnerability allows a user with write permission to a MongoDB collection to inject malicious SQL text, potentially leading to SQL injection attacks and data tampering.

• Potential SQL injection attacks
• Execution of additional SQL text with elevated privileges
• Possible data tampering or unauthorized access

Technical summary

The vulnerability is caused by the lack of escaping of identifier delimiters in MongoDB object names. A user with write permission to a sampled MongoDB collection can choose a name that closes the quoted identifier early, allowing additional SQL text to be executed. This can lead to SQL injection attacks and data tampering. The vulnerability affects MongoDB Connector for BI, and defenders should prioritize verifying and remediating this vulnerability, especially in environments where users have write permissions to MongoDB collections.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability, especially in environments where users have write permissions to MongoDB collections.

Recommended defensive actions

• Verify the version of MongoDB Connector for BI and upgrade to a fixed version if necessary.
• Restrict write permissions to MongoDB collections to prevent exploitation.
• Monitor for suspicious activity in MongoDB collections and SQL servers.
• 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 vulnerability is caused by the lack of escaping of identifier delimiters in MongoDB object names. A user with write permission to a sampled MongoDB collection can choose a name that closes the quoted identifier early, allowing additional SQL text to be executed.

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.