CVE-2026-106436: medium-severity vulnerability in MongoDB PHP Driver
Application denial of service and data truncation via unchecked BSON append failures in MongoDB PHP Driver
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.3epss 0.3%
The BSON encoder in the MongoDB PHP Driver does not check some return values after a document exceeds libbson's size limit. This can leave the encoder in an invalid state. An unauthenticated actor who can cause an affected application to encode an unusually large data structure can terminate the PHP worker or cause the resulting document to omit fields. No MongoDB server connection or database authentication is required.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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-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%CVE-2026-106432LOWHeap buffer overflow via 32-bit string-length truncation in MongoDB PHP DriverEPSS 0.2%