---
cve: "CVE-2026-18709"
severity: "MEDIUM"
cvss: 5.9
epss: "14%"
vendor: "MONGODB"
kev: false
exploited: false
published: "2026-08-11 19:17:25"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T10:28:11+02:00"
---

# CVE-2026-18709

> 5.9 MEDIUM

## Beschreibung

An issue in MongoDB Server could allow an authenticated user with direct network access to a shard to improperly commit or abort an in-progress prepared transaction, bypassing the intended transaction coordination process. This could result in cross-shard data inconsistency, cluster clock corruption, and violation of transaction atomicity guarantees.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- d18b92bf3d150c32f129aba9317efb627d3f5ab1 (Commit)
- 1cf71c50824f7acb2805f2cfe7bb8c06c74c33b8 (Commit)

## Referenzen

- <https://jira.mongodb.org/browse/SERVER-130544>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-18709) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_