External risk intelligence

PraisonAI Action Orchestrator Path Traversal.

CVE advisorySeverity: CRITICAL (CVSS 10.0)

CVE-2026-39305

PraisonAI is a framework for multi-agent systems often deployed as web applications, APIs, or agentic services. Such systems are typically exposed as network-accessible interfaces to interact with users or integrate with other services, making the Action Orchestrator, which handles external requests and agent actions, a plausible target for internet-based interactions in common deployments.

Path Traversal

Praisonai

4.5.112 and earlier

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a Path Traversal vulnerability in the Action Orchestrator feature of the PraisonAI multi-agent teams system. This flaw could allow an attacker to write to arbitrary files outside the intended workspace, potentially overwriting sensitive system files or deploying malicious code.

  • Attackers can write to any file on the system.
  • It impacts systems running PraisonAI multi-agent platforms.
  • Confirm PraisonAI relevance and check for exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted requests to the Action Orchestrator feature of PraisonAI. This could allow them to write files to any location on the server, potentially overwriting critical system files or installing malicious code.

  • No authentication required to access.
  • Relative path segments trigger file overwrite.
  • Arbitrary file write, remote code execution risk.

Live Threat

Current exploitation, exposure, and threat context

The Action Orchestrator feature in PraisonAI could allow an attacker to write files outside of its designated workspace. This could happen when the system processes user-supplied paths containing relative directory traversals, potentially leading to the modification or replacement of critical system files or the execution of malicious code on the host system.

  • Arbitrary file writes on host.
  • Path traversal via malicious input.
  • System compromise or data corruption.

Operational Fix

Recommended remediation, mitigation, and detection steps

The Action Orchestrator feature in PraisonAI, specifically before version 1.5.113, presents a critical Path Traversal vulnerability that could allow unauthorized file writes outside the intended workspace. This risk necessitates immediate attention from teams responsible for PraisonAI deployments, including application owners and potentially infrastructure or security teams. The first practical step is to identify all instances of the affected PraisonAI version, confirm their external reachability and business criticality, and then prioritize remediation efforts based on this assessment.

  • Application owners should lead remediation.
  • Verify PraisonAI instances and their exposure.
  • Plan and coordinate risk-based updates.

Supplementary metadata

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Frequently asked questions

What is PraisonAI?

PraisonAI is a framework used to build and manage multi-agent systems where multiple AI agents work together to complete tasks. It provides tools for orchestrating these agents, often functioning as a web application or API that integrates with other services to process requests and execute actions within a defined workspace.

How does CVE-2026-39305 work?

This vulnerability is a Path Traversal, formally classified as CWE-22. It occurs when the software fails to properly sanitize input, allowing an attacker to use relative path segments like '../' to escape the designated folder. By manipulating these paths, an attacker can trick the system into writing or overwriting files anywhere on the host system's file structure, rather than just within the intended workspace.

What triggers this file write issue?

The flaw is triggered when the Action Orchestrator processes a user-supplied path that includes relative directory traversal characters. Legitimate requests that stay within the assigned workspace directories do not trigger the bug; it specifically requires input designed to navigate outside those boundaries to reach unintended sensitive areas of the file system.

Is my PraisonAI instance at risk?

According to Halo Surface Signal, PraisonAI is often deployed as a web-facing service, which makes it a plausible target for network-based attacks. If your deployment makes the Action Orchestrator reachable over the internet to interact with users or integrate with external services, it is highly relevant to evaluate this risk, as the vulnerability does not require any prior authentication to exploit.

How do I secure my environment?

The primary step is to identify all running versions of PraisonAI within your infrastructure. Since this vulnerability is resolved in version 1.5.113, you should prioritize updating any instances running version 1.5.112 or earlier. Coordinate with your application team to verify the installation and plan the update to the patched version to prevent unauthorized file system access.

References