CVE-2026-106432 — Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver

CVE-2026-106432

Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
MongoDB / PHP Driver	affected 1.16.0 before 1.21.11; affected 2.0.0 before 2.1.11; affected 2.2.0 before 2.5.4

CWE

CWE-681

References

https://jira.mongodb.org/browse/PHPC-2741

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.