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How CVE-2026-XXXXX Works
OpenAM is an open-source Identity and Access Management (IAM) platform that provides SSO, OAuth2, SAML, and OpenID Connect capabilities. To extend functionality, OpenAM allows administrators to write server-side scripts (e.g., Groovy scripts) that run within a sandboxed environment. The sandbox is designed to restrict script authors to a safe subset of Java classes and methods, preventing them from executing arbitrary system commands or accessing sensitive JVM internals. This protection is enforced through class allow lists and deny lists, which are intended to be the last line of defense between a realm-scoped script author and the underlying operating system.
The vulnerability, a Protection Mechanism Failure (CWE-693), arises because the sandbox’s class-filtering logic can be bypassed. An authenticated user with the ability to create or edit server-side scripts—such as a realm administrator—can craft a script that circumvents the sandbox restrictions. By leveraging the default class allow and deny lists, the attacker can invoke classes and methods that were never meant to be accessible from within the scripting context.
Specifically, the sandbox fails to properly restrict access to certain Java classes that provide direct operating-system interaction. An attacker can use these classes to execute arbitrary commands on the underlying host operating system, running with the same privileges as the OpenAM application server process. Because the sandbox is the only code-level defense, a successful bypass effectively compromises the entire OpenAM JVM and all realms it serves.
This vulnerability impacts OpenAM Community Edition through version 16.0.6 and was patched in version 16.1.1. The attack vector requires prior authentication, but the impact is severe: a realm administrator, who should only have realm-scoped privileges, can escalate to full JVM and host-level control, crossing the documented administrative boundary.
DailyCVE Form:
Platform: OpenAM Community Edition
Version: through 16.0.6
Vulnerability: Sandbox Bypass RCE
Severity: Critical
date: 2026-06-25
Prediction: 2026-07-15
What Undercode Say:
Analytics
Check OpenAM version curl -s http://openam-host:8080/openam/version | grep "Version" Attempt to identify vulnerable script endpoints (authenticated) This is a placeholder - actual endpoints may vary curl -X GET "http://openam-host:8080/openam/console/scripts" \ -H "Cookie: iPlanetDirectoryPro=<session-token>" Monitor for suspicious script execution tail -f /path/to/openam/logs/openam.log | grep -i "script|sandbox|exec"
Exploit:
A proof-of-concept script might look like this (Groovy):
// Bypass sandbox using reflection or unsafe class loading // This is a conceptual example - actual exploit details may vary import java.lang.Runtime // Attempt to execute OS command String cmd = "id > /tmp/openam_pwned.txt" Runtime.getRuntime().exec(cmd)
Protection:
- Upgrade to OpenAM Community Edition version 16.1.1 or later.
- If upgrading is not immediately possible, restrict script creation and editing privileges to only the most trusted administrators.
- Consider deploying a Web Application Firewall (WAF) to block suspicious script-related requests.
- Monitor OpenAM logs for unusual script execution or sandbox-related errors.
Impact:
- Scope: Crosses realm-scoped administration boundary to full JVM/host compromise.
- Confidentiality: Attacker can read any file accessible to the OpenAM process.
- Integrity: Attacker can modify system files, OpenAM configuration, and user data.
- Availability: Attacker can disrupt the OpenAM service or the entire host.
- Privilege Escalation: A realm administrator can escalate to the OpenAM application server admin, effectively compromising every realm served by the instance.
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Sources:
Reported By: github.com
Extra Source Hub:
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