CVE-2026-48499 in Activepieces
Summary
by MITRE • 07/30/2026
Activepieces is an open source AI workflow automation platform. Prior to 0.84.0, an unsanitized path segment in the Code piece sandbox can let an authenticated flow author reach read-write cached flow and code files belonging to other tenants on the same worker, exposing embedded data and allowing modified code to execute on a victim tenant's next flow run. This issue is fixed in version 0.84.0.
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability affects Activepieces, an open source AI workflow automation platform that enables users to create automated workflows through visual drag-and-drop interfaces. The issue stems from inadequate input sanitization within the Code piece sandbox functionality, which is designed to execute custom code snippets as part of workflow automation processes. Prior to version 0.84.0, the platform failed to properly validate and sanitize path segments used in its code execution environment, creating a critical security flaw that could be exploited by authenticated users with access to create or modify flows within the system.
The technical flaw manifests as a path traversal vulnerability where maliciously crafted path segments can bypass intended sandbox boundaries and access files outside of the designated execution context. This occurs because the platform does not adequately sanitize user-provided input before using it in file system operations, allowing attackers to construct paths that reference cached flow and code files belonging to other tenants sharing the same worker process. The vulnerability specifically impacts the Code piece functionality which executes custom JavaScript code snippets within a sandboxed environment, but due to insufficient sanitization, the sandbox protection is effectively circumvented.
The operational impact of this vulnerability is severe as it enables a form of tenant isolation bypass that allows authenticated attackers to read and modify cached flow files belonging to other users on the same system instance. This creates a data exposure risk where sensitive information embedded within other tenants' workflows could be accessed, potentially including API keys, database credentials, or proprietary business logic. Additionally, the ability to modify code files means that an attacker could inject malicious code that would execute during subsequent flow runs by victim tenants, creating a persistent backdoor mechanism that could remain undetected for extended periods.
The vulnerability aligns with CWE-22 Path Traversal and CWE-770 Allocation of Resources Without Limits or Throttling categories, representing a classic case where insufficient input validation leads to unauthorized resource access. From an attack perspective, this issue maps to several ATT&CK techniques including T1059 Command and Scripting Interpreter for executing malicious code and T1566 Phishing for initial access to establish the authenticated session required to exploit the vulnerability. The fix implemented in version 0.84.0 addresses this by introducing proper path sanitization mechanisms that validate and normalize all user-provided path segments before they are used in file system operations, ensuring that only legitimate files within the intended execution context can be accessed.
Organizations using Activepieces should immediately upgrade to version 0.84.0 or later to mitigate this vulnerability, while also implementing monitoring for unusual file access patterns or modifications that might indicate exploitation attempts. The security implications extend beyond immediate data exposure to include potential persistence mechanisms through modified code injection, making timely remediation essential for maintaining the integrity of multi-tenant environments where isolation between different user groups is critical for security compliance and data protection.