CVE-2026-106432: low-severity vulnerability in MongoDB PHP Driver
Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2epss 0.2%
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.
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
Affected products
MongoDB · PHP DriverRelated CVEs — MongoDB PHP Driver
In the same product, most dangerous first.
CVE-2026-96745MEDIUMPHP object injection via unsuppressible __pclass class inference in command monitoring eventsEPSS 0.3%CVE-2026-106436MEDIUMApplication denial of service and data truncation via unchecked BSON append failures in MongoDB PHP DriverEPSS 0.3%CVE-2025-12119MEDIUMBulk write with options may read invalid memoryEPSS 0.2%CVE-2026-84968MEDIUMHeap out-of-bounds read via corrupt nested BSON in field path error messageEPSS 0.2%