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TI-2026-30012 Aliases CVE-2026-41412

alf.io vulnerable to Arbitrary File Read and Exfil via simpleHttpClient Extension Script

Priority MEDIUM 56CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00317 24th percentileScored 2026-11-07
Fix Fixed alf.io (alfio-event): 2.0-M5-2606

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
alfio-eventalf.iobefore 2.0-M5-26062.0-M5-2606Patch availableCNA
  • alf.io Vendoralfio-event Affected before 2.0-M5-2606 Fixed in 2.0-M5-2606 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:alf:alf:*:*:*:*:*:*:*:*——alfio-event
  • cpe:2.3:a:alf:alf:*:*:*:*:*:*:*:* Versions — — ·alfio-event

Remediation

  • Fix · CNA alf.io (alfio-event) Fixed in 2.0-M5-2606

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41412

References

Other 1

  • TI-2026-27611 alf.io has an Authenticated RCE via Extension Script Sandbox Escape CVSS 3.1CRITICAL 9.1
  • TI-2024-16863 IDOR Vulnerability: Allowing Organization Owner to view the other Organizations API KEY and USERS CVSS 3.1HIGH 8.8
  • TI-2024-30371 Bypassing promo code limitations with race conditions CVSS 3.1HIGH 7.5
  • TI-2024-16862 IDOR make user can read e-mail log sent by other events CVSS 3.1HIGH 7.2
  • TI-2023-02118 Improper Neutralization of Special Elements Used in a Template Engine in alfio-event/alf.io CVSS 3.1HIGH 7.2
  • TI-2024-30370 alf.io's preloaded data as json is not escaped correctly CVSS 3.1MEDIUM 6.5
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences