Quick answers
- Is CVE-2026-35482 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-35482 being exploited in the wild.
- How severe is CVE-2026-35482?
- High severity, with a CVSS score of 8, published 2 June 2026.
- Which products and versions are affected?
- Alf.Io < 2.0-M5-2606.
- Is there a fix for CVE-2026-35482?
- A patch was published on 2026-06-02. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-35482 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-35482?
- 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 sandbox escape exists in the alf.io extension script engine due to the improper exposure of Java objects within the Rhino JavaScript environment. Specifically, the `ScriptingExecutionService.executeScriptFinally()` method injects an unrestricted `java.lang.Class` object (named `returnClass`) into the script scope. While the system attempts to use AST validation and a class whitelist to restrict script capabilities, an attacker can use `returnClass.forName()` and Java reflection to bypass these controls. By reflecting into `java.lang.Runtime`, an authenticated administrator can execute arbitrary OS commands. The vulnerability is triggered when a malicious extension script is saved and subsequently executed by a system event. This issue is patched in version 2.0-M5-2606.
Affected products
- alfio-event alf.io < 2.0-M5-2606
Timeline
- 2026-06-02: disclosed
- 2026-06-02: advisory
- 2026-06-02: patched