CVE-2026-106432 — Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver
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 allocatio…
Published: 2026-10-08 · CVSS: 2.0 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7