CVE-2026-106436
Application denial of service and data truncation via unchecked BSON append failures in MongoDB PHP Driver
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
The BSON encoder in the MongoDB PHP Driver does not check some return values after a document exceeds libbson's size limit. This can leave the encoder in an invalid state. An unauthenticated actor who can cause an affected application to encode an unusually large data structure can terminate the PHP worker or cause the resulting document to omit fields. No MongoDB server connection or database authentication is required.
| CWE | CWE-252 |
| Vendor | mongodb |
| Product | php driver |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 8, 2026 |
| Last Updated | Oct 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
MongoDB / PHP Driver
1.3.0 < 1.21.11 2.0.0 < 2.1.11 2.2.0 < 2.5.4