External risk intelligence

PraisonAI Agents Unauthenticated Tool Invocation Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-57123

The vulnerability affects a multi-agent framework component that binds to 0.0.0.0 by default, potentially exposing it to local network segments. While network-reachable, such agent or tool server components are typically intended for internal use or developer environments rather than being exposed directly to the public internet.

Missing Authentication

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a critical vulnerability in the PraisonAI multi-agent system that could allow unauthorized access to and invocation of registered tools, potentially leading to file, shell, or code execution. The issue stems from certain server components binding to all network interfaces without proper authentication or security controls, and can be exploited through direct network access or DNS rebinding.

Unsecured tool invocation system.
Confirms system exposure and potential impact.
Assess relevance and secure unauthorized access.

Attack Path

How an attacker could exploit the issue

An attacker can leverage this vulnerability by targeting a PraisonAI instance that is accessible over a network, even without any authentication. By exploiting the lack of security controls on specific API endpoints, an attacker could gain the ability to list and execute any registered tools. This could lead to serious consequences, depending on the nature of the tools that have been made available within the system.

Network access is required.
Unauthenticated API endpoints are triggered.
Arbitrary tool execution is possible.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow any client that can reach the PraisonAI system to list and execute registered tools without authentication. If a browser targets a local instance through DNS rebinding, the impact depends on the specific tools configured, potentially leading to file manipulation, code execution, or shell access.

Registered tools and system access.
Unauthenticated network access or DNS rebinding.
Unauthorized tool execution and potential compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

System owners and platform teams are likely responsible for addressing this critical vulnerability in the PraisonAI multi-agent system, as it affects core server functionalities and tool invocation. The immediate priority is to identify all instances of the affected technology, confirm their reachability and business criticality, and then assign ownership for remediation. Planning should consider the impact on operations and coordinate with any relevant vendor management teams.

Platform or system owners should manage the issue.
Verify tool accessibility and business criticality first.
Plan remediation based on operational impact.

Supplementary metadata

CVSS vector

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Frequently asked questions

What is PraisonAI?

PraisonAI is a framework designed to coordinate multi-agent teams. Developers use it to build automated systems where multiple AI agents work together. These agents often rely on specific tools—such as shell access, file management, or code execution utilities—to perform tasks. The vulnerability specifically affects the 'praisonaiagents' component, which provides the server infrastructure for these tools to function within an agent-based environment.

What does CVE-2026-57123 mean for security?

This vulnerability is primarily classified as missing authentication for critical function (CWE-306). Essentially, the software creates network endpoints for tools but fails to check if the person or system calling them has permission. Because it also ignores origin and DNS-rebinding protections, it allows an unauthorized party to interact with these powerful tools as if they were the legitimate, authenticated owner of the system.

How is this vulnerability triggered?

The issue is triggered when the tool server binds to all network interfaces, making it reachable by other devices. The vulnerability does not require an attacker to guess a password or bypass a login screen, as those controls are completely bypassed. It is important to note that simply running the software is not enough to be vulnerable; the attacker must have network connectivity to the specific PraisonAI instance or be able to reach it via a malicious web request in a browser.

Is my instance at risk?

Halo Surface Signal indicates that while this software is network-reachable, it is typically intended for internal or developer environments rather than public internet exposure. If your instance is hosted on an internal network or local machine, the risk is lower than if it is directly connected to the internet. However, you should still evaluate if your network configuration allows unexpected clients to reach these endpoints.

How do I fix CVE-2026-57123?

The primary solution is to update the 'praisonaiagents' package to version 1.6.59 or later. This update addresses the flaw by correctly invoking security controls that were previously bypassed. If you cannot update immediately, ensure that any instances of the software are restricted to trusted, private network segments and are not accessible from the public internet or through untrusted web browsers.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.