PT-2026-45879 · Alfio Event · Alf.Io

Published 2026-06-02 · Updated 2026-06-02 · CVE-2026-35482

NVD

CVSS v3.1

8.0

High

Base vector

AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-35482

Affected Products

Alf.Io

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-35482 · Security Note
• https://github.com/alfio-event/alf.io/security/advisories/GHSA-3w8f-mcf6-cm7h · Note