---
cve: "CVE-2026-34953"
severity: "CRITICAL"
cvss: 9.1
epss: "38%"
vendor: "mervinpraison"
kev: false
exploited: false
published: "2026-04-03 22:54:03"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T10:56:32+02:00"
---

# CVE-2026-34953

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

PraisonAI is a multi-agent teams system. Prior to version 4.5.97, OAuthManager.validate_token() returns True for any token not found in its internal store, which is empty by default. Any HTTP request to the MCP server with an arbitrary Bearer token is treated as authenticated, granting full access to all registered tools and agent capabilities. This issue has been patched in version 4.5.97.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 06eb6b197cf9c9ccd0839d7a7cefcc25a0d86e82 (Commit)

## Referenzen

- <https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-98f9-fqg5-hvq5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34953) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_