CVE-2026-54840: Tribulant Software Newsletters

High severity, CVSS 7.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Unauthenticated Broken Access Control in Newsletters <= 4.13 versions.

Affected products

• Tribulant Software Newsletters: up to and including 4.13

Published 2026-06-26. Last modified 2026-06-26.