---
cve: "CVE-2026-49986"
severity: "HIGH"
cvss: 7.1
epss: "0.2%"
vendor: "cdeust"
kev: false
exploited: false
published: "2026-08-14 17:18:27"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T23:18:14+02:00"
---

# CVE-2026-49986

> 7.1 HIGH · 🧪 PoC

## Beschreibung

The Cortex MCP server (`neuro-cortex-memory`), a cross-platform persistent memory MCP, prior to version 3.17.1 treats the `CLAUDE_PROJECT_DIR` environment variable — automatically set by Claude Code to the currently open project directory — as a trusted Cortex developer checkout. When the `open_visualization` tool is invoked, `_find_dev_source()` resolves the user's active project directory as a candidate Cortex source root. The only validation performed by `_is_cortex_root()` is a check for the presence of an `mcp_server/` subdirectory and a `ui/unified-viz.html` file. An attacker who places these two marker files in a malicious repository can cause Cortex to execute an arbitrary `mcp_server/server/visualize_bootstrap.py` from that directory via `subprocess.run([sys.executable, ...])`, achieving code execution with the privileges of the victim's local user process. Version 3.17.1 fixes the issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 5d22091a25f0d6817cce61f0cffe1db81a463284 (Commit)

## Referenzen

- <https://github.com/cdeust/Cortex/security/advisories/GHSA-gvpp-v77h-5w8g>
- <https://github.com/cdeust/Cortex/releases/tag/v3.17.1>
- <https://github.com/pypa/advisory-database/tree/main/vulns/neuro-cortex-memory/PYSEC-2026-2676.yaml>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49986) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_