CVE-2026-49442
Received Received - Intake

BaseFortify

Publication date: 2026-10-23

Last updated on: 2026-10-23

Assigner: GitHub, Inc.

Description
Cacti is an open source performance and fault management framework. Prior to version 1.2.31, a User Enumeration vulnerability allows an attacker to identify valid usernames on the Cacti service. When a user attempts to log in, the application returns slightly different error messages depending on whether the provided username exists in the system. When username exists on Cacti, in the response, they see Access Denied! Login failed. When it does not exist on Cacti, they see Access Denied! Login Failed. The only difference between the responses is the capitalization of the letter "f" in the word failed. This issue has been patched in version 1.2.31.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-23
Last Modified
2026-10-23
Generated
2026-10-23
AI Q&A
2026-10-23
EPSS Evaluated
N/A
NVD
CVE-2026-49442
EUVD
EUVD-2026-109089

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Cacti cacti < 1.2.31

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-204 The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

CVE-2026-49442 is a User Enumeration vulnerability in Cacti versions prior to 1.2.31. It allows attackers to identify valid usernames by exploiting subtle differences in error messages during login attempts. When a username exists, the system returns 'Access Denied! Login failed' with a lowercase 'f' in 'failed'. For non-existent usernames, it returns 'Access Denied! Login Failed' with an uppercase 'F'. This inconsistency helps attackers determine valid accounts.

Detection Guidance

This vulnerability can be detected by monitoring login attempts and analyzing error message responses for the specific difference in capitalization of the word 'failed' in error messages. Automated scripts can be used to send login requests with various usernames and check for the slight difference in error message responses.

Impact Analysis

This vulnerability can impact you by enabling attackers to identify valid usernames on your Cacti service. With known usernames, attackers can launch targeted brute-force or phishing attacks, increasing the risk of unauthorized access to your system. It compromises account security and may lead to data breaches or further exploitation of system resources.

Compliance Impact

This vulnerability may affect compliance with GDPR and HIPAA by exposing user account information, which could be considered a breach of confidentiality requirements. GDPR requires protecting personal data, and HIPAA mandates safeguarding protected health information. A successful exploitation could lead to non-compliance penalties and reputational damage.

Mitigation Strategies

Immediately upgrade Cacti to version 1.2.31 or later to patch the vulnerability. Additionally, review and enhance authentication mechanisms to ensure consistent error messages regardless of username validity to prevent user enumeration.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-49442. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart