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CVE-2026-57112— PraisonAI ToolsMCPServer legacy SSE transport accepts attacker Host/Origin and exposes registered tools

Quick assessment

Affected
MervinPraison PraisonAI
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mervin Praison PraisonAI是Mervin Praison个人开发者开源的一个低代码多智能体协作框架。 Mervin Praison PraisonAI 3.10.0版本至4.6.59之前版本和praisonaiagents 0.6.0版本至1.6.59之前版本存在安全漏洞，该漏洞源于ToolsMCPServer.run_sse()将SseServerTransport挂载到旧版/sse和/messages/端点时未默认执行Host、Origin或身份验证，可能导致恶意网站通过DNS重

CVSS 8.3 · High EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
MervinPraison PraisonAI >= 3.10.0, < 4.6.59 affected
MervinPraison praisonaiagents >= 0.6.0, < 1.6.59 affected
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I. Basic Information for CVE-2026-57112

Vulnerability Information
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Vulnerability Title
PraisonAI ToolsMCPServer legacy SSE transport accepts attacker Host/Origin and exposes registered tools
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI is a multi-agent teams system. From praisonaiagents 0.6.0 until 1.6.59 and PraisonAI 3.10.0 until 4.6.59, ToolsMCPServer.run_sse() in src/praisonai-agents/praisonaiagents/mcp/mcp_server.py mounts SseServerTransport on the legacy /sse and /messages/ endpoints without default Host, Origin, or authentication enforcement. A malicious website can use DNS rebinding against a reachable local or internal SSE server, supply attacker-controlled Host and Origin headers, enumerate registered tools, and invoke them with the server user's privileges. The Streamable HTTP transport rejects the same hostile Origin, which isolates the flaw to the legacy SSE wrapper. An initial remediation was released in praisonaiagents 1.6.59 and PraisonAI 4.6.59.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Mervin Praison PraisonAI 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mervin Praison PraisonAI是Mervin Praison个人开发者开源的一个低代码多智能体协作框架。 Mervin Praison PraisonAI 3.10.0版本至4.6.59之前版本和praisonaiagents 0.6.0版本至1.6.59之前版本存在安全漏洞，该漏洞源于ToolsMCPServer.run_sse()将SseServerTransport挂载到旧版/sse和/messages/端点时未默认执行Host、Origin或身份验证，可能导致恶意网站通过DNS重
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
MervinPraison PraisonAI >= 3.10.0, < 4.6.59 -
MervinPraison praisonaiagents >= 0.6.0, < 1.6.59 -

II. Public POCs for CVE-2026-57112

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III. Intelligence Information for CVE-2026-57112

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Patches & Fixes for CVE-2026-57112 (1)

Vendor Advisories for CVE-2026-57112 (1)

Vendor Pages for CVE-2026-57112 (1)

Same Patch Batch · MervinPraison · 2026-09-15 · 12 CVEs total

CVE-2026-57138 9.9 CRITICAL PraisonAI codeMode sandbox escape via Function constructor
CVE-2026-57139 9.8 CRITICAL PraisonAI MCPServer exposes unauthenticated HTTP tools/call
CVE-2026-57141 9.8 CRITICAL PraisonAI: Remote Code Execution via Sandbox Escape in `codeMode` Tool
CVE-2026-57147 9.8 CRITICAL praisonai-platform: default JWT signing secret 'dev-secret-change-me' enables token forger
CVE-2026-57148 9.8 CRITICAL praisonai-platform 0.1.4 still boots on the hardcoded JWT secret dev-secret-change-me (def
CVE-2026-57140 9.4 CRITICAL PraisonAI AgentOS exposes unauthenticated agent listing and invocation
CVE-2026-57133 8.8 HIGH PraisonAI utility shell safe-command wrapper allowlist bypass via shell chaining
CVE-2026-57136 8.8 HIGH PraisonAI SandboxExecutor allowedCommands bypass via shell chaining
CVE-2026-57137 8.8 HIGH PraisonAI AgentLoop onToolCall approval runs after tool execution
CVE-2026-57134 8.2 HIGH PraisonAI MCPSecurity Basic/OAuth authentication policies accept invalid credentials witho
CVE-2026-57135 7.6 HIGH PraisonAI SandboxExecutor network-isolated mode does not block non-proxy-aware network cli

IV. Related Vulnerabilities

Same product: PraisonAI
Same vendor: MervinPraison
Same weakness: CWE-306