Vulnerability in MongoDB PHP Driver
CVE-2026-106432
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.6 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-106432?
- CVE-2026-106432 is a low-severity vulnerability in MongoDB PHP Driver, classified under Incorrect Conversion between Numeric Types. CVSS score: 3.6/10. Published 2026-10-08.
- How severe is CVE-2026-106432?
- Low severity. CVSS v3 base score is 3.6 out of 10.