CVE-2026-55528 in PraisonAI
Summary
by MITRE • 08/25/2026
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.58, AgentServer exposes ServerConfig.auth_token but AgentServer._create_app does not check it on any route. A remote caller can subscribe, publish, and perform other actions without a valid bearer token or X-Auth-Token even when authentication is configured. This issue is fixed in version 1.6.58.
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Analysis
by VulDB Data Team • 08/25/2026
The vulnerability identified in PraisonAI prior to version 1.6.58 represents a critical failure in access control mechanisms within the AgentServer component of this multi-agent team system. The core technical flaw lies in the implementation of the authentication middleware and route handling logic. Specifically, while the ServerConfig object correctly exposes an auth_token parameter intended for securing API endpoints, the internal method _create_app responsible for initializing the application routes fails to enforce any validation checks against this token. This architectural oversight means that the security configuration is effectively decoupled from its enforcement mechanism, creating a situation where authentication settings are defined but never applied during request processing.
From an operational perspective, this misconfiguration results in a complete bypass of authentication requirements for all exposed endpoints on the AgentServer. A remote attacker can interact with the system without providing any valid credentials, such as a bearer token or X-Auth-Token header. The impact is severe because it allows unauthorized entities to subscribe to agent events, publish commands, and execute other sensitive actions that should be restricted to authenticated users. In a multi-agent environment where agents may have access to external tools, databases, or network resources, this lack of authentication can lead to data exfiltration, manipulation of agent behavior, denial of service through resource exhaustion, or further lateral movement within the associated infrastructure if the agents possess elevated privileges.
This vulnerability aligns with CWE-287, which describes Improper Authentication, as well as CWE-306, Missing Authentication for Critical Function, since specific critical functions like publishing and subscribing are accessible without verification of identity. In terms of the MITRE ATT&CK framework, this flaw facilitates initial access and potentially privilege escalation if combined with other vulnerabilities, allowing an adversary to interact directly with system components that should be protected by identity management controls. The absence of token validation on any route means there is no gatekeeping mechanism to verify user intent or legitimacy before processing requests.
To mitigate this risk, organizations must upgrade immediately to PraisonAI version 1.6.58 or later, where the developers have corrected the _create_app logic to properly validate authentication tokens against all relevant routes. Until an update can be applied, administrators should consider network-level mitigations such as restricting access to the AgentServer ports via firewall rules or reverse proxy configurations that enforce external authentication checks. Additionally, implementing strict input validation and monitoring for unusual patterns of subscription or publication activity can help detect potential exploitation attempts in environments where patching is delayed. It is also recommended to review other components of the multi-agent system to ensure no similar gaps exist in their respective security implementations.