CVE-2026-39893
Received Received - Intake
BaseFortify

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-25
AI Q&A
2026-06-25
EPSS Evaluated
N/A
NVD
CVE-2026-39893
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
cacti cacti to 1.2.31 (exc)
cacti cacti 1.2.31
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
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Executive Summary

This vulnerability exists in Cacti versions 1.2.30 and prior, where the 'rfilter' request variable is concatenated directly into a RLIKE SQL clause without proper sanitization. Because the endpoint does not require authentication and supports guest access for graph viewing, an attacker can exploit this SQL injection vulnerability without needing to log in.

Impact Analysis

The vulnerability has a high severity with a CVSS score of 9.8, indicating it can be exploited remotely without authentication. Successful exploitation can lead to full compromise of confidentiality, integrity, and availability of the affected system, allowing attackers to execute arbitrary SQL commands, potentially accessing or modifying sensitive data and disrupting service.

Mitigation Strategies

The vulnerability in Cacti versions 1.2.30 and prior is fixed in version 1.2.31.

To mitigate this vulnerability, you should immediately upgrade your Cacti installation to version 1.2.31 or later.

Additionally, if guest viewing is enabled, consider disabling it temporarily to reduce exposure until the upgrade can be applied.

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