MervinPraison PraisonAI up to 4.5.127 /api/agents allow_origins information disclosure

Summaryinfo

A vulnerability marked as problematic has been reported in MervinPraison PraisonAI up to 4.5.127. This affects the function allow_origins of the file /api/agents. Performing a manipulation results in information disclosure. This vulnerability is reported as CVE-2026-40151. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in MervinPraison PraisonAI up to 4.5.127. This affects the function allow_origins of the file /api/agents. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-40151 since 04/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 4.5.128 eliminates this vulnerability.

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Productinfo

Vendor

• MervinPraison

Name

• PraisonAI

Version

• 4.5.127

Website

• Product: https://github.com/MervinPraison/PraisonAI/

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