---
cve: "CVE-2026-55157"
severity: "HIGH"
cvss: 8.4
epss: "0.7%"
vendor: "ooples"
kev: false
exploited: false
published: "2026-09-28 18:17:23"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-04T20:10:45+02:00"
---

# CVE-2026-55157

> 8.4 HIGH · 🧪 PoC

## Beschreibung

Token Optimizer MCP measures token savings per AI coding agent, optimizes context, and shares a live local knowledge graph across 16 CLI clients. Prior to version 5.1.0, token-optimizer-mcp is vulnerable to OS command injection in the smart_user tool. Any MCP client that can call the smart_user tool can execute arbitrary shell commands through the username argument of the get-user-info operation. The commands execute with the privileges of the user running the token-optimizer-mcp server. This issue has been patched in version 5.1.0.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-10-01 14:47:57
- CNA-CVSS: **8.4** (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| 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 | Hoch | bad |

## Patch verfügbar (OSV)

- b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7 (Commit)
- 94815a16e3322101694e97561fc1dc8b5af904dc (Commit)

## Referenzen

- <https://github.com/ooples/token-optimizer-mcp/security/advisories/GHSA-49mq-fc6q-3h46>
- <https://github.com/ooples/token-optimizer-mcp/commit/b4ee96dac799cbfba0a9f9c17844ce9d613cbcc7>
- <https://github.com/ooples/token-optimizer-mcp/releases/tag/v5.1.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55157) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_