CVE-2026-35482: CWE-863: Incorrect Authorization in alfio-event alf.io
CVE-2026-35482 is a high-severity vulnerability in alf. io, an open source ticket reservation system. Versions prior to 2. 0-M5-2606 contain a sandbox escape flaw in the extension script engine that allows an authenticated administrator to execute arbitrary operating system commands on the server. This occurs because the sandboxed Rhino JavaScript environment can be escaped via an unguarded injected Java object and incomplete AST blocklist, enabling Java reflection without validation. The issue is patched in version 2. 0-M5-2606.
AI Analysis
Technical Summary
alf.io versions before 2.0-M5-2606 have an incorrect authorization vulnerability (CWE-863) in the extension script engine. The engine is designed to run restricted JavaScript in a sandboxed Rhino environment, but a combination of an unguarded injected Java object (`returnClass`) and an incomplete abstract syntax tree (AST) blocklist allows sandbox escape. This enables an authenticated administrator to execute arbitrary OS commands on the server via Java reflection without triggering validation errors. The vulnerability is fixed in version 2.0-M5-2606.
Potential Impact
An authenticated administrator can bypass sandbox restrictions and execute arbitrary operating system commands on the server hosting alf.io. This can lead to full system compromise, including confidentiality, integrity, and availability impacts. The CVSS v3.1 score is 8.0 (high), reflecting network attack vector, high privileges required, no user interaction, and complete impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade alf.io to version 2.0-M5-2606 or later, where this vulnerability is patched. No other remediation or temporary fixes are indicated. Since this is not a cloud service, patching the software is required to mitigate the risk.
CVE-2026-35482: CWE-863: Incorrect Authorization in alfio-event alf.io
Description
CVE-2026-35482 is a high-severity vulnerability in alf. io, an open source ticket reservation system. Versions prior to 2. 0-M5-2606 contain a sandbox escape flaw in the extension script engine that allows an authenticated administrator to execute arbitrary operating system commands on the server. This occurs because the sandboxed Rhino JavaScript environment can be escaped via an unguarded injected Java object and incomplete AST blocklist, enabling Java reflection without validation. The issue is patched in version 2. 0-M5-2606.
CVSS v3.1
Score 8.0high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
alf.io versions before 2.0-M5-2606 have an incorrect authorization vulnerability (CWE-863) in the extension script engine. The engine is designed to run restricted JavaScript in a sandboxed Rhino environment, but a combination of an unguarded injected Java object (`returnClass`) and an incomplete abstract syntax tree (AST) blocklist allows sandbox escape. This enables an authenticated administrator to execute arbitrary OS commands on the server via Java reflection without triggering validation errors. The vulnerability is fixed in version 2.0-M5-2606.
Potential Impact
An authenticated administrator can bypass sandbox restrictions and execute arbitrary operating system commands on the server hosting alf.io. This can lead to full system compromise, including confidentiality, integrity, and availability impacts. The CVSS v3.1 score is 8.0 (high), reflecting network attack vector, high privileges required, no user interaction, and complete impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade alf.io to version 2.0-M5-2606 or later, where this vulnerability is patched. No other remediation or temporary fixes are indicated. Since this is not a cloud service, patching the software is required to mitigate the risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-02T20:49:44.454Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1f64cce29bf47b5010d690
Added to database: 6/2/2026, 11:18:36 PM
Last enriched: 6/2/2026, 11:33:32 PM
Last updated: 6/3/2026, 12:55:30 AM
Views: 4
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