SQL Injection in Cacti
CVE-2026-39893
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.
Vulnerability class: SQL Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Cacti — versions < 1.2.31
Weakness classification (CWE)
References
- github.com/Cacti/cacti/pull/7039 (Patch, Issue Tracking)
- github.com/Cacti/cacti/security/advisories/GHSA-69gg-mjfm-jjpc (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-39893?
- CVE-2026-39893 is a critical-severity vulnerability in Cacti, classified under SQL Injection. CVSS score: 9.8/10. Published 2026-06-24.
- How severe is CVE-2026-39893?
- Critical severity. CVSS v3 base score is 9.8 out of 10.