CVE-2026-39938: Cacti

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have unauthenticated LFI through graph_theme and rrdtool IPC serialization hardening. This issue has been resolved in version 1.2.31.

Affected products

• Cacti Cacti: before 1.2.31 (fixed in 1.2.31)

Published 2026-06-24. Last modified 2026-06-26.