CVE-2026-106437

highpriority · track · 30EPSS 0.001 · 1 %ileDEUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.10% (1st) EPSS

CVSS 7.4 · high

Is it mine?

9 products

Check your exposure

Who says so?

2 sources

cert_bund · nvd

EPSS · scored 2026-10-27

The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to pass an undersized value to bson_reserve_buffer and then perform an affected operation.

cvss

Technical severity, 0–10. One row per scoring source.

7.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2.2–7.4

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 5.2

v3.16.2mediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Hsecondary · cna@mongodb.comexploitability 1.4 · impact 4.7

v4.05.9mediumCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · cna@mongodb.com

v4.02.2lowCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-191US

affected products (9)

Products and version ranges known to be affected.

Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Microsoft Azure Linux azl3all versionscert_bundDEcpe:/o:microsoft:azure_linux:azl3
Open Source MongoDB C# Driverall versionscert_bundDEcpe:/a:mongodb:mongodb:c_driver
Open Source MongoDB Go Driverall versionscert_bundDEcpe:/a:mongodb:mongodb:go_driver
Open Source MongoDB PHP Driverall versionscert_bundDEcpe:/a:mongodb:mongodb:php_driver
Open Source MongoDB Python Driverall versionscert_bundDEcpe:/a:mongodb:mongodb:python_driver
Open Source MongoDB libmongocryptall versionscert_bundDEcpe:/a:mongodb:mongodb:libmongocrypt
mongodb c driver1.4.0 → 1.30.13nvdUScpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*
mongodb c driver2.0.0 → 2.5.6nvdUScpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3830MongoDB Treiber: Mehrere SchwachstellenDeutsch2026-10-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen MongoDB Treibern ausnutzen, um einen Denial of Service Angriff durchzuführen und um Daten zu manipulieren.

sources

Which sources assert this record, and when.

cert_bund nvd NVD CVE.org MITRE

published 2026-10-08modified 2026-10-27

references (1) nvd

External citations — patches, advisories, analysis.

https://jira.mongodb.org/browse/CDRIVER-6423Vendor AdvisoryIssue Tracking

scry

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