CVE-2026-86259: Thu-Maic Openmaic

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenMAIC before 1.0.1 skips server-side request forgery validation in non-production builds, allowing unauthenticated attackers to reach cloud instance metadata services. Attackers can supply arbitrary provider URLs via the x-base-url header or baseUrl parameter to access sensitive cloud credentials and metadata.

Affected products

• Thu-Maic Openmaic: before 1.0.1 (fixed in 1.0.1)

Published 2026-09-06. Last modified 2026-09-10.