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Vulnerability · Published Jun 24, 2026 · Assigned by GitHub_M

CVE-2026-39893Cacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php

Critical 9.8

In plain English

A critical-severity SQL injection in cacti from Cacti. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 47.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12cactino fix listedDEBIAN-CVE-2026-39893
Debian:13cactino fix listedDEBIAN-CVE-2026-39893
Debian:14cacti1.2.31+ds1-1DEBIAN-CVE-2026-39893
Ubuntu:24.04:LTScactino fix listedUBUNTU-CVE-2026-39893
Ubuntu:25.10cactino fix listedUBUNTU-CVE-2026-39893
Ubuntu:26.04:LTScactino fix listedUBUNTU-CVE-2026-39893
Ubuntu:26.10cactino fix listedUBUNTU-CVE-2026-39893

Affected products (as reported)

VendorProductVersions
Cacti cacti < 1.2.31

Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References