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CVE-2026-49986— Cortex has Untrusted Project Bootstrap Code Execution via `CLAUDE_PROJECT_DIR`

Quick assessment

Affected
cdeust Cortex
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Clement Cortex是Clement个人开发者的一款威胁分析与管理平台。 Clement Cortex 3.17.1之前版本存在软件供应链问题漏洞，该漏洞源于将CLAUDE_PROJECT_DIR环境变量视为可信的Cortex开发者检出目录，仅验证mcp_server/子目录和ui/unified-viz.html文件是否存在，攻击者在恶意仓库中放置这两个标记文件可导致Cortex执行任意mcp_server/server/visualize_bootstrap.py，实现代码执行。

CVSS 7.1 · High EPSS 0.11% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
cdeust Cortex < 3.17.1 affected
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I. Basic Information for CVE-2026-49986

Vulnerability Information
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Vulnerability Title
Cortex has Untrusted Project Bootstrap Code Execution via `CLAUDE_PROJECT_DIR`
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
从非可信控制范围包含功能例程
Source: CVE Program / CVE List V5
Vulnerability Title
Clement Cortex 软件供应链问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Clement Cortex是Clement个人开发者的一款威胁分析与管理平台。 Clement Cortex 3.17.1之前版本存在软件供应链问题漏洞，该漏洞源于将CLAUDE_PROJECT_DIR环境变量视为可信的Cortex开发者检出目录，仅验证mcp_server/子目录和ui/unified-viz.html文件是否存在，攻击者在恶意仓库中放置这两个标记文件可导致Cortex执行任意mcp_server/server/visualize_bootstrap.py，实现代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cdeust Cortex < 3.17.1 -

II. Public POCs for CVE-2026-49986

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6823 chars
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III. Intelligence Information for CVE-2026-49986

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Vendor Advisories for CVE-2026-49986 (3)

IV. Related Vulnerabilities

Same product: Cortex
Same weakness: CWE-829

V. Comments for CVE-2026-49986

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