CVE-2026-35482

HIGHPre-NVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 89% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
8.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.0Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.0
EG Score
8.0(medium)
EPSS
11.3%
KEV
Not listed

Published

June 2, 2026

Last Modified

June 4, 2026

Advisory Details (1)

Auto-updated Jun 3, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Authenticated RCE via Extension Script Sandbox Escape · Advisory · alfio-event/alf.io · GitHub

https://github.com/alfio-event/alf.io/security/advisories/GHSA-3w8f-mcf6-cm7h

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 77× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 121 total refreshes for this CVE.

  1. 2026-07-14 15:15 UTCEG score recompute
  2. 2026-07-14 03:34 UTCEG score recompute
  3. 2026-07-13 22:30 UTCEPSS rescore
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  1. 2026-07-01 09:58 UTCEG score recompute
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  74. 2026-06-08 04:40 UTCEG score recompute
  75. 2026-06-07 17:16 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-35482?
CVE-2026-35482 is a high vulnerability published on June 2, 2026. 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…
When was CVE-2026-35482 disclosed?
CVE-2026-35482 was first published in the National Vulnerability Database on June 2, 2026, with the most recent update on June 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35482 actively exploited?
CVE-2026-35482 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35482?
CVE-2026-35482 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2026-35482?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35482, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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