CVE-2026-41412: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in alfio-event alf.io
alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. Prior to version 2.0-M5-2606, the alf.io extension sandbox injects a fully-functional HTTP client (`simpleHttpClient`) into every extension script's scope. The `postFileAndSaveResponse()` method accepts an arbitrary filesystem path as its `file` parameter and reads the file contents using `new FileInputStream(file)` with no path validation, directory restriction, or allowlist. A malicious extension script can read any file accessible to the JVM process user and exfiltrate it to an attacker-controlled server via HTTP POST. Version 2.0-M5-2606 patches the issue.
AI Analysis
Technical Summary
The vulnerability in alf.io (CVE-2026-41412) involves improper limitation of a pathname to a restricted directory (CWE-22). Specifically, the extension sandbox injects a fully-functional HTTP client into extension scripts, and its postFileAndSaveResponse() method reads files from arbitrary filesystem paths without validating or restricting the path. This allows a malicious extension script to read any file accessible by the JVM process user and send its contents to an attacker-controlled server via HTTP POST. The issue is fixed in alf.io version 2.0-M5-2606.
Potential Impact
An attacker with the ability to run extension scripts in the alf.io sandbox can read arbitrary files on the host filesystem accessible to the JVM user and exfiltrate sensitive data. This compromises confidentiality but does not affect integrity or availability. The CVSS score is 4.9 (medium severity) reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high confidentiality impact.
Mitigation Recommendations
Upgrade alf.io to version 2.0-M5-2606 or later, where this vulnerability is patched. No other mitigations are indicated by the vendor advisory. Patch status is not explicitly stated as 'official-fix' but the description confirms the issue is fixed in 2.0-M5-2606.
CVE-2026-41412: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in alfio-event alf.io
Description
alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. Prior to version 2.0-M5-2606, the alf.io extension sandbox injects a fully-functional HTTP client (`simpleHttpClient`) into every extension script's scope. The `postFileAndSaveResponse()` method accepts an arbitrary filesystem path as its `file` parameter and reads the file contents using `new FileInputStream(file)` with no path validation, directory restriction, or allowlist. A malicious extension script can read any file accessible to the JVM process user and exfiltrate it to an attacker-controlled server via HTTP POST. Version 2.0-M5-2606 patches the issue.
CVSS v3.1
Score 4.9medium
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in alf.io (CVE-2026-41412) involves improper limitation of a pathname to a restricted directory (CWE-22). Specifically, the extension sandbox injects a fully-functional HTTP client into extension scripts, and its postFileAndSaveResponse() method reads files from arbitrary filesystem paths without validating or restricting the path. This allows a malicious extension script to read any file accessible by the JVM process user and send its contents to an attacker-controlled server via HTTP POST. The issue is fixed in alf.io version 2.0-M5-2606.
Potential Impact
An attacker with the ability to run extension scripts in the alf.io sandbox can read arbitrary files on the host filesystem accessible to the JVM user and exfiltrate sensitive data. This compromises confidentiality but does not affect integrity or availability. The CVSS score is 4.9 (medium severity) reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high confidentiality impact.
Mitigation Recommendations
Upgrade alf.io to version 2.0-M5-2606 or later, where this vulnerability is patched. No other mitigations are indicated by the vendor advisory. Patch status is not explicitly stated as 'official-fix' but the description confirms the issue is fixed in 2.0-M5-2606.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-20T15:32:33.812Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1f64cce29bf47b5010d696
Added to database: 06/02/2026, 23:18:36 UTC
Last enriched: 06/10/2026, 11:15:41 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 85
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.