GHSA-3w8f-mcf6-cm7h
HIGHGHSA-3w8f-mcf6-cm7h is a high-severity (CVSS 8) CWE-863 vulnerability. O3 Security confirms whether GHSA-3w8f-mcf6-cm7h is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
alf.io has an Authenticated RCE via Extension Script Sandbox Escape
Description
alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. Prior to version 2.0-M5-2606, a sandbox escape vulnerability in the alf.io extension script engine allows an authenticated administrator to execute arbitrary operating system commands on the server. The extension system is intended to execute restricted JavaScript in a sandboxed Rhino environment; however, a combination of an unguarded injected Java object (returnClass) and an incomplete AST blocklist allows the sandbox to be fully escaped using Java reflection without triggering any validation errors. Version 2.0-M5-2606 patches the issue.
Detection & mitigation playbook
VulnerabilityDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of the affected component has shipped for GHSA-3w8f-mcf6-cm7h yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-3w8f-mcf6-cm7h is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-3w8f-mcf6-cm7h. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-3w8f-mcf6-cm7h in your dependencies?
O3 detects GHSA-3w8f-mcf6-cm7h across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.