CVE-2026-39893
Pre-auth SQL injection in Cacti enables DB access via guest view.
Is CVE-2026-39893 being exploited?
Not confirmed. CVE-2026-39893 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.67% probability of exploitation in the next 30 days.
How severe is CVE-2026-39893?
CVE-2026-39893 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-39893?
Yes. A fix has been recorded for CVE-2026-39893. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-39893 affect?
CVE-2026-39893 affects Cacti <= 1.2.30. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-39893?
Upgrade to 1.2.31 or later
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Pre-auth SQLi via rfilter allows data exfiltration/modify via backend DB; exploitable when guest viewing is enabled.
Patch immediately
- affected< 1.2.31
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.