CVE-2026-106432
Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver
- State
- Published
- Severity
- 2.0 Low
- Published
- Oct 8, 2026
- Updated
- Oct 8, 2026
- Reserved
- Oct 6, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.0 Low | CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N | mongodb |
| 3.1 | 3.6 Low | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L | mongodb |
Weaknesses
- CWE-681 Incorrect Conversion between Numeric Types
Affected Products
| Product | Versions |
|---|---|
PHP DriverMongoDB |
|
References
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.