External risk intelligence

Astron Agent LocalExecutor Code Execution Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.9)

CVE-2026-108263

The vulnerability resides in an agentic workflow platform that provides API endpoints (/console-api/workflow/code/run and /workflow/v1/run) for executing code. Such workflow platforms are commonly deployed as web applications or API services intended for user interaction, making the vulnerable endpoints reachable in standard network-accessible service configurations.

Missing Authentication

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

A security vulnerability has been identified in the Astron Agent platform, an AI agent workflow tool. If exploited, an authenticated user with low privileges could execute unauthorized code with root access within the system's container. This could allow them to access or modify data belonging to other users and disrupt shared services. The issue is addressed in version 1.1.2.

  • Unauthorized code execution by low-privilege users.
  • Potential for data breaches and service disruption.
  • Confirming relevance and exposure is the priority.

Attack Path

How an attacker could exploit the issue

An attacker with low-level authenticated access to the Astron Agent platform can exploit a weakness in how code is executed within workflows. By sending requests to specific API endpoints, an attacker can bypass security restrictions and run arbitrary code with root privileges inside a container. This allows them to access and manipulate data belonging to other users and disrupt shared services.

  • Authenticated low-privilege user.
  • Execute code via workflow API endpoints.
  • Compromise tenant data and shared services.

Live Threat

Current exploitation, exposure, and threat context

An authenticated, low-privilege user could execute arbitrary code with root privileges within the core-workflow container. This elevated access could allow bypassing tenant isolation to read or modify data belonging to other tenants, or to disrupt shared services.

  • Other tenants' data.
  • Code execution via API calls.
  • Tenant data compromise and service disruption.

Operational Fix

Recommended remediation, mitigation, and detection steps

Real-world action for this critical vulnerability likely falls to platform or application owners responsible for the Astron Agent, in coordination with infrastructure and security teams. The immediate first step is to identify all deployments of Astron Agent, determine if they are internet-facing or accessible by low-privilege users, and then confirm the accountable owner for each instance. This will enable a risk-based approach to remediation, including planning for upgrades or implementing compensating controls.

  • Platform or application owners should lead.
  • Verify affected technology and exposure.
  • Plan remediation based on identified risk.

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 Astron Agent?

Astron Agent is a platform designed for building and managing automated AI agents. It uses workflow engines to process tasks, often interacting with data and external services through API endpoints. By design, it orchestrates how code is executed to perform these tasks, making it a central component for organizations developing agentic workflows.

What is the vulnerability in CVE-2026-108263?

This flaw is classified primarily as Improper Neutralization of Directives in Dynamically Evaluated Code (CWE-95). Essentially, the platform's default execution mode fails to apply necessary security sandboxing. This allows dynamic code to run with full Python capabilities rather than restricted ones, granting the code excessive permission to interact with the underlying system.

How is this vulnerability triggered?

An attacker triggers this by interacting with specific workflow API endpoints, such as those used for running code nodes. The issue occurs when the system defaults to using the LocalExecutor without explicit configuration changes. Note that this bug is not triggered by administrative or unauthenticated users; it requires an existing, authenticated account with low-level privileges.

Do I need to worry if my instance is not on the public internet?

Yes, you should still evaluate the risk. According to Halo Surface Signal, because this platform provides accessible API endpoints for workflow execution, these services are often reachable within standard network configurations. Even if not directly internet-facing, an internal user or a compromised account within your network could still leverage this access.

When should I prioritize updating to version 1.1.2?

You should prioritize this update immediately if you host Astron Agent instances that allow low-privilege users to run workflows. Your first step is to inventory your active deployments to identify where this software is running. Once identified, confirm the accountable team and coordinate an upgrade to version 1.1.2 to secure the code execution environment.

References