CVE-2025-26042

Medium severity, CVSS 6.0. EPSS: 0.4% chance of exploitation in the next 30 days.

Uptime Kuma >== 1.23.0 has a ReDoS vulnerability, specifically when an administrator creates a notification through the web service. If a string is provided it triggers catastrophic backtracking in the regular expression, leading to a ReDoS attack.

Published 2025-03-17. Last modified 2026-06-17.