CVE-2026-106435 (GCVE-0-2026-106435)

Vulnerability from cvelistv5 – Published: 2026-10-08 20:12 – Updated: 2026-10-09 11:49
VLAI
Title
Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver
Summary
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.
Severity
5.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.1 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 11:49 UTC
CWE
Assigner
mongodb CNA under the mitre root
CNA scorecard C 70/100 over 205 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
MongoDB Python Driver Affected: 0.10.3 , ≤ 4.18.2 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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