CVE-2026-39893

Published Jun 24, 2026

Last updated 5 days ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-39893 is a pre-authentication SQL injection vulnerability found in Cacti, an open-source performance and fault management framework. This flaw affects versions 1.2.30 and earlier. The vulnerability stems from insufficient sanitization of the `rfilter` request variable, which is directly concatenated into a `RLIKE` SQL clause within the `graph_view.php` component. When guest viewing is enabled on a Cacti installation, this vulnerability allows unauthenticated attackers to inject malicious SQL payloads. The issue was addressed and fixed in Cacti version 1.2.31.

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.
Source: security-advisories@github.com
NVD status: Analyzed
Products: cacti

Risk scores

CVSS 3.1

Type: Secondary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Weaknesses

security-advisories@github.com: CWE-89

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 14

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:cacti:cacti:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "5406B2E1-D53C-45AC-8F93-CFCAEDC1B5F8",
            "versionEndExcluding": "1.2.31",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.