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CVE-2026-34935— PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()

CVSS 9.8 · Critical EPSS 0.04% · P12
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I. Basic Information for CVE-2026-34935

Vulnerability Information
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Vulnerability Title
PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command()
Source: NVD (National Vulnerability Database)
Vulnerability Description
PraisonAI is a multi-agent teams system. From version 4.5.15 to before version 4.5.69, the --mcp CLI argument is passed directly to shlex.split() and forwarded through the call chain to anyio.open_process() with no validation, allowlist check, or sanitization at any hop, allowing arbitrary OS command execution as the process user. This issue has been patched in version 4.5.69.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
PraisonAI 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PraisonAI是Mervin Praison个人开发者的一个低代码多智能体协作框架。 PraisonAI 4.5.15至4.5.69之前版本存在操作系统命令注入漏洞，该漏洞源于--mcp CLI参数未经任何验证、白名单检查或清理直接传递，可能导致任意操作系统命令执行。
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)

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Affected Products

VendorProductAffected VersionsCPESubscribe
MervinPraisonPraisonAI >= 4.5.15, < 4.5.69 -

II. Public POCs for CVE-2026-34935

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III. Intelligence Information for CVE-2026-34935

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Same Patch Batch · MervinPraison · 2026-04-03 · 10 CVEs total

CVE-2026-3493810.0 CRITICALPraisonAI: Python Sandbox Escape via str Subclass startswith() Override in execute_code
CVE-2026-349349.8 CRITICALPraisonAI: Second-Order SQL Injection in `get_all_user_threads`
CVE-2026-349529.1 CRITICALPraisonAI: Missing Authentication in WebSocket Gateway
CVE-2026-349539.1 CRITICALPraisonAI: Authentication Bypass in OAuthManager.validate_token()
CVE-2026-349558.8 HIGHPraisonAI: Sandbox Escape via shell=True and Bypassable Blocklist in SubprocessSandbox
CVE-2026-349548.6 HIGHPraisonAI: SSRF in FileTools.download_file() via Unvalidated URL
CVE-2026-349377.8 HIGHPraisonAI: Shell Injection in run_python() via Unescaped $() Substitution
CVE-2026-349367.7 HIGHPraisonAI: SSRF via Unvalidated api_base in passthrough() Fallback
CVE-2026-349396.5 MEDIUMPraisonAI: ReDoS via Unvalidated User-Controlled Regex in MCPToolIndex.search_tools()

IV. Related Vulnerabilities

Same product: PraisonAI
Same vendor: MervinPraison
Same weakness: CWE-78

V. Comments for CVE-2026-34935

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