---
cve: "CVE-2026-18688"
severity: "HIGH"
cvss: 7.1
epss: "27%"
vendor: "MONGODB"
kev: false
exploited: false
published: "2026-08-11 19:17:22"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T13:30:24+02:00"
---

# CVE-2026-18688

> 7.1 HIGH

## Beschreibung

An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation pipeline stage. This could result in a server crash (denial of service) and may potentially expose a limited amount of memory contents.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- d18b92bf3d150c32f129aba9317efb627d3f5ab1 (Commit)
- 1cf71c50824f7acb2805f2cfe7bb8c06c74c33b8 (Commit)

## Referenzen

- <https://jira.mongodb.org/browse/SERVER-129617>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-18688) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_