Vulnerability Details CVE-2026-106435
The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON containing a truncated regular-expression element without a trailing NUL byte. An actor who can supply BSON to the documented decode or decode_all API can cause the application process to terminate when the C extension is loaded. The driver's normal database wire-protocol path does not reach this code.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 0.9%
CVSS Severity
CVSS v3 Score 5.1
References