CVE-2025-35434: Cisa Thorium

Critical severity, CVSS 9.8. EPSS: 0.2% chance of exploitation in the next 30 days.

CISA Thorium does not validate TLS certificates when connecting to Elasticsearch. An unauthenticated attacker with access to a Thorium cluster could impersonate the Elasticsearch service. Fixed in 1.1.2.

Affected products

• Cisa Thorium: before 1.1.2 (fixed in 1.1.2)

Published 2025-09-17. Last modified 2026-06-17.