CVE-2026-84969

lowpriority · track · 15EPSS 0.003 · 19 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (19th) EPSS

CVSS 3.7 · low

Is it mine?

6 products

Check your exposure

Who says so?

2 sources

cert_bund · nvd

EPSS · scored 2026-10-27

A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of bytes past the end of a heap buffer when a binary field is encoded and the output is cut short at a caller-configured length limit. A party who supplies the document content, with no privileges on the application that links the driver, may cause a small amount of data outside the intended buffer to be altered.

cvss

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

6.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.7–6.3

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 1.4

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · cna@mongodb.comexploitability 2.2 · impact 1.4

v4.06.3mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/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

v4.01.7lowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/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-787US

affected products (6)

Products and version ranges known to be affected.

Open Source MongoDB C Driver <1.30.9all versionscert_bundDE
Open Source MongoDB C Driver <2.5.2all versionscert_bundDE
Open Source MongoDB≤ C Driver <1.30.9cert_bundDE
Open Source MongoDB≤ C Driver <2.5.2cert_bundDE
mongodb c driver1.30.0 → 1.30.9nvdUScpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*
mongodb c driver2.0.0 → 2.5.2nvdUScpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3182MongoDB: Mehrere SchwachstellenDeutsch2026-09-03csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen MongoDB Treibern und einer Bibliothek ausnutzen, um Daten zu manipulieren oder offenzulegen, sowie um einen Denial of Service Zustand herbeizuführen.

sources

Which sources assert this record, and when.

cert_bund nvd NVD CVE.org MITRE

published 2026-09-03modified 2026-09-03

references (1) nvd

External citations — patches, advisories, analysis.

https://jira.mongodb.org/browse/CDRIVER-6410

scry

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