CVE-2026-106432
Low
Description
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.
SeverityLow
CVSS3.6
Exploit probability—
Product
Mongodb Php Driver
PublishedOct 8, 2026
First seenOct 8, 2026
Weakness typeCWE-681CWE-681
How to fix
Update
- mongodb php_driver1.21.1, 2.1.11, 2.5.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mongodb php_driver | 1.3.0 ≤ v < 1.21.1, 2.0.0 ≤ v < 2.1.11, 2.2.0 ≤ v < 2.5.4 | 1.21.1, 2.1.11, 2.5.4 |
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