CVE-2026-6231

highpriority · track · 30EPSS 0.002 · 8 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.18% (8th) EPSS

CVSS 7.5 · high

Is it mine?

16 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

The bson_validate function may return early on specific inputs and incorrectly report success. This behavior could result in skipping validation for BSON data, allowing malformed or invalid UTF-8 sequences to bypass validation and be processed incorrectly. The issue may affect applications that rely on these functions to validate untrusted BSON data before further processing. This issue affects MongoDB C Driver versions prior to 1.30.5, MongoDB C Driver version 2.0.0 and MongoDB C Driver version 2.0.1

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 1.3–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.14.3mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · cna@mongodb.comexploitability 2.8 · impact 1.4

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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

v4.01.3lowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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-20USCWE-20US

affected products (16)

Products and version ranges known to be affected.

Open Source MongoDB C Driver <2.1.0all versionscert_bundDE
Open Source MongoDB C Driver <1.30.5all versionscert_bundDE
Open Source MongoDB C Driver <2.0.2all versionscert_bundDE
Open Source MongoDB≤ C Driver <2.0.2cert_bundDE
Open Source MongoDB≤ C Driver <2.1.0cert_bundDE
Open Source MongoDB≤ C Driver <1.30.5cert_bundDE
MongoDB Inc. C Driver1.0 → 1.30.5enisa_euvdEU
MongoDB Inc. C Driver2.0 → 2.0.2enisa_euvdEU
MongoDB Inc. MongoDB C Driver≤ 1.30.5fstec_bduRU
MongoDB Inc. MongoDB C Driver2.0.0 → 2.0.2fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 8.0fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 12fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 13fstec_bduRU
mongodb c driver< 1.30.5nvdUScpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*
mongodb c driver2.0.0 → 2.0.2nvdUScpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1079MongoDB C Driver: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2026-04-13csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in MongoDB C Driver ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2026-04-13modified 2026-10-26

references (4)

External citations — patches, advisories, analysis.

scry

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