CVE-2026-39893: 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. In versions 1.2.30 and prior, the rfilter request variable was concatenated into a RLIKE SQL clause without sanitization. The endpoint does not require authentication (graph viewing supports guest access via the configured guest user), so the SQLi was reachable pre-auth on installs with guest viewing enabled. This issue was fixed 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.