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CVE-2026-40151— PraisonAI Affected by Unauthenticated Information Disclosure of Agent Instructions via /api/agents in AgentOS

Quick assessment

Affected
MervinPraison PraisonAI
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.

PraisonAI是Mervin Praison个人开发者的一个低代码多智能体协作框架。 PraisonAI 4.5.128之前版本存在信息泄露漏洞，该漏洞源于AgentOS部署平台未实施身份验证且默认CORS配置允许任意来源访问，可能导致未经身份验证的调用者获取代理信息。

CVSS 5.3 · Medium EPSS 0.84% · P56

Public Exploits 1

Nuclei · 1 CVE-2026-40151.yaml [template]
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I. Basic Information for CVE-2026-40151

Vulnerability Information
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Vulnerability Title
PraisonAI Affected by Unauthenticated Information Disclosure of Agent Instructions via /api/agents in AgentOS
Source: CVE Program / CVE List V5
Vulnerability Description
PraisonAI is a multi-agent teams system. Prior to 4.5.128, the AgentOS deployment platform exposes a GET /api/agents endpoint that returns agent names, roles, and the first 100 characters of agent system instructions to any unauthenticated caller. The AgentOS FastAPI application has no authentication middleware, no API key validation, and defaults to CORS allow_origins=["*"] with host="0.0.0.0", making every deployment network-accessible and queryable from any origin by default. This vulnerability is fixed in 4.5.128.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
PraisonAI 信息泄露漏洞
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 4.5.128之前版本存在信息泄露漏洞，该漏洞源于AgentOS部署平台未实施身份验证且默认CORS配置允许任意来源访问，可能导致未经身份验证的调用者获取代理信息。
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 < 4.5.128 -

II. Public POCs for CVE-2026-40151

# POC Description Source Link Shenlong Link
1 PraisonAI's AgentOS FastAPI application server exposes an unauthenticated `GET /api/agents` endpoint that lists every registered agent's name, role and the opening of its instructions (system prompt). No authentication is enforced on the route, allowing a remote attacker to enumerate agent configurations and harvest sensitive details embedded in system prompts, such as internal API references, business logic and credential hints. This endpoint belongs to the AgentOS FastAPI server and is distinct from the legacy Flask `/agents` server tracked as CVE-2026-44338. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-40151.yaml POC Details
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III. Intelligence Information for CVE-2026-40151

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Vendor Advisories for CVE-2026-40151 (1)

Same Patch Batch · MervinPraison · 2026-04-09 · 15 CVEs total

CVE-2026-40088 9.7 CRITICAL Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVE-2026-40154 9.3 CRITICAL PraisonAI Affected by Untrusted Remote Template Code Execution
CVE-2026-40113 8.4 HIGH PraisonAI has an Argument Injection into Cloud Run Environment Variables via Unsanitized C
CVE-2026-40149 7.9 HIGH PraisonAI has an Unauthenticated Allow-List Manipulation Bypasses Agent Tool Approval Safe
CVE-2026-40150 7.7 HIGH PraisonAIAgents has SSRF and Local File Read via Unvalidated URLs in web_crawl Tool
CVE-2026-40116 7.5 HIGH PraisonAI's Unauthenticated WebSocket Endpoint Proxies to Paid OpenAI Realtime API Without
CVE-2026-40153 7.4 HIGH PraisonAIAgents Affected by Environment Variable Secret Exfiltration via os.path.expandvar
CVE-2026-40114 7.2 HIGH PraisonAI has Server-Side Request Forgery via Unvalidated webhook_url in Jobs API
CVE-2026-40148 6.5 MEDIUM PraisonAI Affected by Decompression Bomb DoS via Recipe Bundle Extraction Without Size Lim
CVE-2026-40115 6.2 MEDIUM PraisonAI has an Unrestricted Upload Size in WSGI Recipe Registry Server Enables Memory Ex
CVE-2026-40117 6.2 MEDIUM PraisonAIAgents Affected by Arbitrary File Read via read_skill_file Missing Workspace Boun
CVE-2026-40112 5.4 MEDIUM PraisonAI has Stored XSS via Unsanitized Agent Output in HTML Rendering (nh3 Not a Require
CVE-2026-40152 5.3 MEDIUM PraisonAIAgents has a Path Traversal via Unvalidated Glob Pattern in list_files Bypasses W
CVE-2026-40111 PraisonAIAgents has an OS Command Injection via shell=True in Memory Hooks Executor (memor

IV. Related Vulnerabilities

Same product: PraisonAI
Same vendor: MervinPraison
Same weakness: CWE-200

V. Comments for CVE-2026-40151

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