CVE-2026-35482

HIGH EPSS 11.3%
Published Jun 2, 20264w ago · Modified Jun 17, 20262w ago
8.0 CVSS 3.1
High
Find Similar
Published Jun 2, 2026 4w ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
8.0
Exploitability
1.3
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required High
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
11.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

References 1

  • github.com https://github.com/alfio-event/alf.io/security/advisories/GHSA-3w8f-mcf6-cm7h

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.