Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alf | Alf | < 2.0-M5-2606 |
Related Weaknesses (CWE)
References
- https://github.com/alfio-event/alf.io/security/advisories/GHSA-3w8f-mcf6-cm7hExploitVendor Advisory
- https://github.com/alfio-event/alf.io/security/advisories/GHSA-3w8f-mcf6-cm7hExploitVendor Advisory
FAQ
What is CVE-2026-35482?
CVE-2026-35482 is a vulnerability with a CVSS score of 8.0 (HIGH). 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 eng...
How severe is CVE-2026-35482?
CVE-2026-35482 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-35482?
Check the references section above for vendor advisories and patch information. Affected products include: Alf Alf.