CVE-2026-40151: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in MervinPraison PraisonAI
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.
AI Analysis
Technical Summary
PraisonAI versions before 4.5.128 include an unauthenticated API endpoint (/api/agents) that returns agent metadata and partial system instructions. The AgentOS platform lacks authentication and API key validation, and its default CORS and host settings allow any origin to access this endpoint over the network. This results in unauthorized disclosure of sensitive information (CWE-200). The issue is resolved in version 4.5.128.
Potential Impact
An unauthenticated attacker can retrieve agent names, roles, and partial system instructions from the exposed API endpoint. This information disclosure is limited to the first 100 characters of instructions and does not affect integrity or availability. The CVSS score is 5.3 (medium severity), reflecting the network accessibility and lack of authentication but limited confidentiality impact.
Mitigation Recommendations
Upgrade PraisonAI to version 4.5.128 or later, where this vulnerability is fixed. Prior versions expose sensitive information due to missing authentication and permissive CORS settings. No other official remediation or temporary fixes are documented. Until upgraded, restrict network access to the AgentOS deployment platform to trusted users only.
CVE-2026-40151: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in MervinPraison PraisonAI
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
PraisonAI versions before 4.5.128 include an unauthenticated API endpoint (/api/agents) that returns agent metadata and partial system instructions. The AgentOS platform lacks authentication and API key validation, and its default CORS and host settings allow any origin to access this endpoint over the network. This results in unauthorized disclosure of sensitive information (CWE-200). The issue is resolved in version 4.5.128.
Potential Impact
An unauthenticated attacker can retrieve agent names, roles, and partial system instructions from the exposed API endpoint. This information disclosure is limited to the first 100 characters of instructions and does not affect integrity or availability. The CVSS score is 5.3 (medium severity), reflecting the network accessibility and lack of authentication but limited confidentiality impact.
Mitigation Recommendations
Upgrade PraisonAI to version 4.5.128 or later, where this vulnerability is fixed. Prior versions expose sensitive information due to missing authentication and permissive CORS settings. No other official remediation or temporary fixes are documented. Until upgraded, restrict network access to the AgentOS deployment platform to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-09T19:31:56.013Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d843771cc7ad14da3fb5c9
Added to database: 4/10/2026, 12:25:27 AM
Last enriched: 4/10/2026, 12:37:20 AM
Last updated: 4/10/2026, 8:14:11 AM
Views: 6
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