Heap over-read or silent misparse via 32-bit truncation of JSON length in BSON JSON parser (MongoDB C++ Driver)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.12 % · percentile 2 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mongodb
- NVD status
- Analyzed
Description
A numeric truncation weakness exists in the JSON parsing component of the MongoDB C++ Driver's BSON library. An actor who controls the text that an embedding application hands to the library's public JSON parsing interface, when that text is very large, can cause the library to read memory beyond the supplied buffer and return it to the caller, to silently accept only part of the input as a complete document, or to terminate the process. No MongoDB server, credentials, or non-default configuration is required; the effect is confined to the process that uses the library.
Weaknesses (CWE)
- CWE-681 — Incorrect Conversion between Numeric Types
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | MEDIUM 5.9 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N | mongodb |
| CVSS 3.1 | MEDIUM 6.2 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H | mongodb |
| CVSS 4.0 | MEDIUM 5.9 | CVSS: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:X | NVD · cna@mongodb.com (Secondary) |
| CVSS 3.1 | MEDIUM 6.2 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H | NVD · cna@mongodb.com (Secondary) |
| CVSS 3.1 | MEDIUM 5.8 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-70505
- GCVE · GCVE-0-2026-84970
CERT-FR advisories
- CERTFR-2026-AVI-1123 — Multiples vulnérabilités dans MongoDB · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:mongodb:c\+\+_driver:*:*:*:*:*:mongodb:*:*≥ 3.2.0 < 4.5.2
Affected products
| Product | Versions |
|---|---|
| MongoDB · C++ Driver | affected 3.2.0 < 4.5.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |