CVE-2026-6811
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
A stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.
Risk Assessment
Applications using this driver may crash, leading to service disruptions and potential availability loss.
Recommendation
Update the MongoDB PHP driver to the latest version that includes the fix. Avoid processing untrusted deeply nested BSON documents.
Other vulnerabilities in MongoDB PHP driver
See all- CVE-2026-96745Medium
A deserialization vulnerability in the command monitoring support of the MongoDB PHP Driver can cause class names from document content to be honored when building monitoring events. An attacker controlling data in database operations may instantiate application classes implementing the persistable interface and invoke their unserialize method.
- CVE-2026-84968Medium
An out-of-bounds read in the BSON decoding component of the MongoDB PHP driver may allow an unauthenticated party who supplies specially formed input to have a small amount of adjacent process memory copied into an error message that is returned to application code. This may result in unintended disclosure of limited memory contents.
Original NVD description (English source)
Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.