CVE-2026-41412
alf.io vulnerable to Arbitrary File Read and Exfil via simpleHttpClient Extension Script
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.
INFO
Published Date :
June 2, 2026, 11:16 p.m.
Last Modified :
July 21, 2026, 7:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update alf.io to version 2.0-M5-2606 or later.
- Apply vendor patches when available.
- Validate file paths for access control.
- Restrict file read permissions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41412.
| URL | Resource |
|---|---|
| https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373 | |
| https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41412 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41412
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41412 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41412 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Translation Title: alf.io de alfio-event, Description: alf.io es un sistema de reserva de entradas de código abierto para conferencias, ferias comerciales, talleres y encuentros. Antes de la versión 2.0-M5-2606, la sandbox de la extensión de alf.io inyecta un cliente HTTP completamente funcional ('simpleHttpClient') en el ámbito de cada script de extensión. El método 'postFileAndSaveResponse()' acepta una ruta de sistema de archivos arbitraria como su parámetro 'file' y lee el contenido del archivo usando 'new FileInputStream(file)' sin validación de ruta, restricción de directorio o lista de permitidos. Un script de extensión malicioso puede leer cualquier archivo accesible para el usuario del proceso JVM y exfiltrarlo a un servidor controlado por un atacante a través de HTTP POST. La versión 2.0-M5-2606 corrige el problema. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'alfio-event', 'product': 'alf.io', 'versions': [{'status': 'affected', 'version': '< 2.0-M5-2606'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41412', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-03T14:01:59.867408Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 03, 2026
Action Type Old Value New Value Added Reference https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373 -
New CVE Received by [email protected]
Jun. 02, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-22 Added CWE CWE-73 Added Reference https://github.com/alfio-event/alf.io/security/advisories/GHSA-6m62-53cw-4373