CVE-2026-106432
Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver
CVSS Score
3.6
EPSS Score
0.0%
EPSS Percentile
0th
The BSON encoder in the MongoDB PHP Driver converts a string length to a 32-bit value without validation. When an affected application encodes a string near 4 GiB, the allocation size can wrap while the copy operation uses the original length. The resulting heap buffer overflow can corrupt process memory or terminate the PHP process. Reaching this issue requires a non-default runtime configuration that permits multi-gigabyte values. No MongoDB server interaction is required.
| CWE | CWE-681 |
| 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:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
MongoDB / PHP Driver
1.16.0 < 1.21.11 2.0.0 < 2.1.11 2.2.0 < 2.5.4