CVE-2026-23830 — AI Deep Analysis Summary

🚨 **Essence**: SandboxJS < 0.8.26 fails to isolate `AsyncFunction` within `SandboxFunction`. <br>💥 **Consequences**: This flaw allows **Sandbox Escape** and **Remote Code Execution (RCE)**. Critical integrity loss.

🛡️ **CWE**: CWE-94 (Improper Control of Generation of Code). <br>🔍 **Flaw**: The sandbox environment does not properly isolate asynchronous functions, breaking the security boundary.

📦 **Vendor**: nyariv. <br>📦 **Product**: SandboxJS. <br>⚠️ **Affected**: Versions **prior to 0.8.26**. Ensure you are not running legacy builds.

👑 **Privileges**: Full Remote Code Execution. <br>📊 **Data**: High impact on Confidentiality, Integrity, and Availability. Attackers gain complete control over the host system.

🔓 **Threshold**: **LOW**. <br>📝 **Details**: CVSS Vector `AV:N/AC:L/PR:N/UI:N`. No authentication, no user interaction, and network-accessible. Extremely easy to exploit remotely.

💣 **Exploit**: **YES**. <br>🔗 **PoC**: Public Proof-of-Concept available at `https://github.com/Galaxy-sc/CVE-2026-23830-SandBreak`. Wild exploitation is possible.

🔍 **Check**: Scan for SandboxJS installations. <br>📋 **Version**: Verify if version is **< 0.8.26**. Look for improper `AsyncFunction` handling in the sandbox context.

✅ **Fix**: **YES**. <br>🔧 **Patch**: Update to **SandboxJS 0.8.26** or later. Official advisory: `GHSA-wxhw-j4hc-fmq6`. Commit `345aee6` addresses the issue.

🚧 **Workaround**: If patching is delayed, **disable** the `SandboxFunction` or restrict `AsyncFunction` usage. Isolate the service in a container with strict capabilities.

🔥 **Urgency**: **CRITICAL**. <br>⏱️ **Priority**: Immediate action required. High CVSS score + Public PoC + No Auth needed = High risk of active exploitation.