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.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 9647af6d-7a05-11f1-99fc-40b034429ecf advisory.

    Cacti project reports:
    This release includes fixes for a number of vulnerabilities that were responsibly disclosed by external     researchers

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to its banner, the version of Cacti running on the remote host is < 1.2.31. It is, therefore, affected by multiples vulnerabilities :

- An Unauthenticated LFI via graph_theme and rrdtool IPC serialization hardening

- An Unauthenticated SQL injection via rfilter RLIKE clause in graph_view.php

- An Unauthenticated SQL injection via unanchored FILTER_VALIDATE_REGEXP in graph_view.php

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-39893)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
325775	FreeBSD : cacti -- multiple vulnerabilities (9647af6d-7a05-11f1-99fc-40b034429ecf)	Nessus	FreeBSD Local Security Checks	critical
115280	Cacti Multiples Vulnerabilities	Web App Scanning	Component Vulnerability	critical
323755	Linux Distros Unpatched Vulnerability : CVE-2026-39893	Nessus	Misc.	critical

Detections

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CVE-2026-39893

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Tenable Plugins

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