---
cve: "CVE-2026-81522"
severity: "HIGH"
cvss: 8.1
epss: "25.1%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-08-27 20:18:50"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T14:39:28+02:00"
---

# CVE-2026-81522

> 8.1 HIGH

## Beschreibung

A weakness in the MongoDB C++ Driver's handling of caller-supplied namespace identifiers allows special characters embedded in those identifiers. An application that builds a namespace identifier from untrusted input without validating it may therefore have its operation directed at a different target than intended. This can result in limited unauthorized read and write access to data belonging to another logical tenant of the affected application.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- a163ce324ab34d36edab5c5f69ea903859572d27 (Commit)

## Referenzen

- <https://github.com/mongodb/mongo-cxx-driver/releases/tag/r4.5.1>
- <https://jira.mongodb.org/browse/CXX-3552>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-81522) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_