CVE-2026-106435 — Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver
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 t…
Published: 2026-10-08 · CVSS: 5.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7