CVE-2026-39938
Received Received - Intake
Unauthenticated Local File Inclusion in Cacti

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. Versions 1.2.30 and prior have unauthenticated LFI through graph_theme and rrdtool IPC serialization hardening. This issue has been resolved 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-2026-39938
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
cacti cacti to 1.2.31 (exc)
cacti cacti 1.2.31
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
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Impact Analysis

This vulnerability has a high severity with a CVSS score of 9.8, indicating it can have a critical impact. Because it allows unauthenticated Local File Inclusion, an attacker can potentially read sensitive files, execute arbitrary code, or disrupt the availability of the system. This can lead to full compromise of the affected system, including confidentiality, integrity, and availability impacts.

Executive Summary

This vulnerability affects Cacti, an open source performance and fault management framework. Versions 1.2.30 and earlier have an unauthenticated Local File Inclusion (LFI) vulnerability through the graph_theme and rrdtool IPC serialization hardening features. This means that an attacker can exploit these features without authentication to include local files on the server, potentially leading to unauthorized access or code execution. The issue has been fixed in version 1.2.31.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Cacti to version 1.2.31 or later, as this version resolves the unauthenticated local file inclusion issue.

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