CVE-2026-57128 in PraisonAI
Summary
by MITRE • 09/14/2026
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.58, the SSE server in src/praisonai-agents/praisonaiagents/server/server.py does not consult ServerConfig.auth_token before handling /publish, /events, or /info requests. A network client that can reach the server can broadcast arbitrary events to connected clients and obtain server configuration and client-count information. This issue is fixed in praisonaiagents 1.6.58.
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Analysis
by VulDB Data Team • 09/14/2026
The vulnerability identified in PraisonAI prior to version 1.6.58 represents a critical authentication bypass within the Server-Sent Events (SSE) server implementation located at src/praisonai-agents/praisonaiagents/server/server.py. This flaw stems from an incomplete integration of security controls, specifically where the SSE endpoint handlers for /publish, /events, and /info routes fail to validate or consult the ServerConfig.auth_token before processing incoming requests. In a properly secured multi-agent system architecture, any interface that allows interaction with connected clients or exposes internal state information must enforce strict access control mechanisms to ensure that only authorized entities can perform actions or retrieve sensitive data. The absence of this check creates an open channel for unauthorized network actors who possess basic connectivity to the server infrastructure.
From a technical perspective, the core issue lies in the request handling logic which directly processes HTTP requests without invoking the authentication middleware or checking against the configured authorization token. This design oversight allows any client capable of reaching the server over the network to interact with these endpoints as if they were an authenticated administrator or trusted agent. The /publish endpoint enables the broadcasting of arbitrary events to all connected clients, while the /events and /info endpoints expose operational metadata such as current connection counts and detailed server configuration data. This lack of enforcement effectively renders the authentication mechanism inert for a significant portion of the SSE functionality, undermining the security model intended by the application developers.
The operational impact of this vulnerability is severe due to its potential for both information disclosure and active exploitation within multi-agent environments. An attacker can leverage the /info endpoint to gather intelligence about the system's current state, including the number of connected clients and specific configuration parameters that may reveal internal architecture details or third-party integrations. More critically, the ability to broadcast arbitrary events via the /publish endpoint allows an adversary to inject malicious commands or data into the event stream received by all active agents. In a multi-agent team system where agents often execute tasks based on incoming instructions, this could lead to unauthorized actions being performed, such as executing code, accessing sensitive files, or manipulating other agents' behaviors. This scenario aligns with CWE-287 Improper Authentication and CWE-306 Missing Authentication for Critical Function, highlighting a fundamental failure in access control logic.
Furthermore, the exploitation of this vulnerability facilitates lateral movement and persistence within an organization's network if PraisonAI is deployed internally. The ability to inject arbitrary events can be used to disrupt service availability or manipulate agent workflows to achieve specific malicious objectives without detection by standard authentication logs. This behavior maps closely to ATT&CK techniques such as T1078 Valid Accounts, where the attacker effectively uses valid but unauthenticated access paths, and potentially T1565 Data Manipulation if the injected events alter stored data or system state indirectly through agent actions. The lack of rate limiting or input validation on these endpoints also opens the door to denial-of-service attacks by flooding connected clients with excessive event streams.
To mitigate this vulnerability, organizations must immediately upgrade PraisonAI and its associated praisonaiagents package to version 1.6.58 or later, where the authentication check has been properly implemented for all SSE-related routes. Until an update is applied, network-level controls should be enforced by restricting access to the server port using firewall rules that only allow connections from trusted IP addresses or subnets. Additionally, deploying a reverse proxy with strict authentication requirements in front of the PraisonAI service can provide an additional layer of defense by ensuring that all requests are validated before reaching the application logic. It is also recommended to audit other endpoints within the system for similar omissions in access control checks and to implement comprehensive logging and monitoring to detect any unauthorized attempts to interact with these SSE interfaces. Regular security assessments focusing on API authentication flows will help prevent recurrence of such misconfigurations in future development cycles.