---
cve: "CVE-2026-84969"
severity: "MEDIUM"
cvss: 6.3
epss: "0.2%"
vendor: "MONGODB"
kev: false
exploited: false
published: "2026-09-03 15:17:36"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T23:53:31+02:00"
---

# CVE-2026-84969

> 6.3 MEDIUM

## Beschreibung

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-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- f64476433230847fb0f43afaeb7be048eb817f8b (Commit)
- 52ffca1e649b597c51162b5b3b37f057b73b059d (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-84969) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_