CVE-2026-39900
Received Received - Intake
Reflected XSS in Cacti via auth_profile.php tab parameter

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 are vulnerable to Reflected XSS via tab parameter in the auth_profile.php JavaScript context. This issue has been 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-2026-39900
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-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

CVE-2026-39900 is a vulnerability in Cacti, an open source performance and fault management framework. Versions 1.2.30 and earlier are affected by a Reflected Cross-Site Scripting (XSS) vulnerability. This occurs via the 'tab' parameter in the auth_profile.php file within a JavaScript context. The vulnerability allows an attacker to inject malicious scripts that are reflected back to the user.

This issue has been fixed in version 1.2.31 of Cacti.

Impact Analysis

The Reflected XSS vulnerability can allow attackers to execute malicious scripts in the context of a user's browser session when they interact with the vulnerable parameter. This can lead to theft of user credentials, session hijacking, or performing actions on behalf of the user without their consent.

Since the vulnerability requires user interaction (UI:P), the attacker typically needs to trick the user into clicking a crafted link or visiting a malicious page.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Cacti to version 1.2.31 or later, as this version contains the fix for the Reflected XSS issue via the tab parameter in auth_profile.php.

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