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.
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References
History
Wed, 03 Jun 2026 02:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | alf.io vulnerable to Arbitrary File Read and Exfil via simpleHttpClient Extension Script | |
| Weaknesses | CWE-22 CWE-73 |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-02T22:51:36.358Z
Reserved: 2026-04-20T15:32:33.812Z
Link: CVE-2026-41412
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Status : Received
Published: 2026-06-02T23:16:37.793
Modified: 2026-06-02T23:16:37.793
Link: CVE-2026-41412
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OpenCVE Enrichment
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