CVE-2026-47396: CWE-284: Improper Access Control in MervinPraison PraisonAI
PraisonAI versions prior to 4.6.40 have an improper access control vulnerability in the call server's agent control API. When the environment variable CALL_SERVER_TOKEN is not set, the authentication mechanism fails open, allowing unauthenticated remote clients to control agents. This includes listing, inspecting, invoking, and unregistering agents. The call server binds to all network interfaces (0.0.0.0), increasing exposure risk. Version 4.6.40 addresses this issue.
AI Analysis
Technical Summary
CVE-2026-47396 describes an improper access control vulnerability (CWE-284) in MervinPraison's PraisonAI multi-agent system. The call server component exposes an agent control API that relies on a token-based authentication helper verify_token(). If the CALL_SERVER_TOKEN environment variable is unset, verify_token() fails open, effectively disabling authentication. This allows any network-reachable client to perform sensitive operations on agents, such as listing, inspecting metadata, invoking, and unregistering them. The vulnerable router praisoniai.api.agent_invoke is mounted by praisoniai.api.call, which binds to 0.0.0.0, exposing the API to all network interfaces. The issue is fixed in version 4.6.40.
Potential Impact
An unauthenticated remote attacker can fully control agent operations on the PraisonAI call server, including listing agents, viewing sensitive metadata and instructions, invoking agents, and unregistering them. This leads to complete confidentiality, integrity, and availability compromise of the agent control plane. The vulnerability is critical with a CVSS score of 9.8, indicating high exploitability and severe impact.
Mitigation Recommendations
Upgrade PraisonAI to version 4.6.40 or later, where the authentication failure is fixed. Until then, ensure the CALL_SERVER_TOKEN environment variable is explicitly set to a strong token before launching the call server to enforce authentication. Since this is a configuration-dependent vulnerability, operators must verify token configuration to avoid exposure.
CVE-2026-47396: CWE-284: Improper Access Control in MervinPraison PraisonAI
Description
PraisonAI versions prior to 4.6.40 have an improper access control vulnerability in the call server's agent control API. When the environment variable CALL_SERVER_TOKEN is not set, the authentication mechanism fails open, allowing unauthenticated remote clients to control agents. This includes listing, inspecting, invoking, and unregistering agents. The call server binds to all network interfaces (0.0.0.0), increasing exposure risk. Version 4.6.40 addresses this issue.
CVSS v3.1
Score 9.8critical
Affected software
pkg:github/mervinpraison/PraisonAIRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-47396 describes an improper access control vulnerability (CWE-284) in MervinPraison's PraisonAI multi-agent system. The call server component exposes an agent control API that relies on a token-based authentication helper verify_token(). If the CALL_SERVER_TOKEN environment variable is unset, verify_token() fails open, effectively disabling authentication. This allows any network-reachable client to perform sensitive operations on agents, such as listing, inspecting metadata, invoking, and unregistering them. The vulnerable router praisoniai.api.agent_invoke is mounted by praisoniai.api.call, which binds to 0.0.0.0, exposing the API to all network interfaces. The issue is fixed in version 4.6.40.
Potential Impact
An unauthenticated remote attacker can fully control agent operations on the PraisonAI call server, including listing agents, viewing sensitive metadata and instructions, invoking agents, and unregistering them. This leads to complete confidentiality, integrity, and availability compromise of the agent control plane. The vulnerability is critical with a CVSS score of 9.8, indicating high exploitability and severe impact.
Mitigation Recommendations
Upgrade PraisonAI to version 4.6.40 or later, where the authentication failure is fixed. Until then, ensure the CALL_SERVER_TOKEN environment variable is explicitly set to a strong token before launching the call server to enforce authentication. Since this is a configuration-dependent vulnerability, operators must verify token configuration to avoid exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-19T19:22:45.729Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5f96f32a4a8d59895fb321
Added to database: 07/21/2026, 15:57:39 UTC
Last enriched: 07/30/2026, 09:23:09 UTC
Last updated: 09/02/2026, 22:52:12 UTC
Views: 78
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