CVE-2026-28149: Miniorange Headless Single Sign On

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Unauthenticated PHP Object Injection in Headless Single Sign On <= 1.6 versions.

Affected products

• Miniorange Headless Single Sign On: up to and including 1.6

Published 2026-08-13. Last modified 2026-08-14.