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CVE-2026-35482

Alf broken access control

8.0 HIGHPublic exploitEPSS 0.42%
  1. Published2 Jun 2026

Description

alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. Prior to version 2.0-M5-2606, a sandbox escape vulnerability in the alf.io extension script engine allows an authenticated administrator to execute arbitrary operating system commands on the server. The extension system is intended to execute restricted JavaScript in a sandboxed Rhino environment; however, a combination of an unguarded injected Java object (`returnClass`) and an incomplete AST blocklist allows the sandbox to be fully escaped using Java reflection without triggering any validation errors. Version 2.0-M5-2606 patches the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Alf< 2.0-M5-2606

Remediation

Fixed in
Alf≥ 2.0-M5-2606

References

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Frequently asked

Is CVE-2026-35482 being actively exploited?

CVE-2026-35482 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.42%.

How severe is CVE-2026-35482?

CVE-2026-35482 has a CVSS 3.1 base score of 8.0, rated high. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2026-35482?

Affected products include Alf.

How do I fix CVE-2026-35482?

Upgrade affected software to a fixed version, for example Alf 2.0-M5-2606 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-35482 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.