CVE-2026-106435 — Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver

CVE-2026-106435

Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
MongoDB / Python Driver	affected 0.10.3 through 4.18.2

CWE

CWE-125

References

https://jira.mongodb.org/browse/PYTHON-6110

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.