Quick answers
- Is CVE-2026-41412 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-41412 being exploited in the wild.
- How severe is CVE-2026-41412?
- Medium severity, with a CVSS score of 4.9, published 2 June 2026.
- Which products and versions are affected?
- Alf.Io <= 2.0-M5-2509-1.
- Is there a fix for CVE-2026-41412?
- A patch was published on 2026-06-02: Fixed in version 2.0-M5-2606 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-41412 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-41412?
- Check whether you run Alf.Io at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A path traversal vulnerability exists in the Alf.io extension sandbox due to the injection of a fully-functional HTTP client (`simpleHttpClient`) into the scope of extension scripts. The `postFileAndSaveResponse()` method in this client accepts an arbitrary filesystem path as a parameter and uses `new FileInputStream(file)` without any path validation, directory restrictions, or allowlists. An authenticated attacker with administrative privileges can create a malicious JavaScript extension to read sensitive files (such as `application.properties` or SSH keys) accessible to the JVM process and exfiltrate them via an HTTP POST request to an external server. The issue is fixed in version 2.0-M5-2606.
Affected products
- alfio-event Alf.io <= 2.0-M5-2509-1
Timeline
- 2026-06-02: disclosed
- 2026-06-02: advisory
- 2026-06-02: patched: Fixed in version 2.0-M5-2606