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CVE-2026-49442— Cacti: User Enumeration via Error Messages

Quick assessment

Affected
Cacti cacti
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cacti 是一个开源的性能与故障管理框架。在 1.2.31 版本之前，存在一个用户枚举漏洞，允许攻击者识别 Cacti 服务中的有效用户名。当用户尝试登录时，应用程序会根据所提供的用户名是否存在于系统中，返回略有不同的错误消息：若用户名存在于 Cacti 中，响应显示为"Access Denied! Login failed"；若用户名不存在，则显示为"Access Denied! Login Failed"。两者之间的唯一区别在于单词"failed"中字母"f"的大小写。该问题已在 1.2.31 版本中修复。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1110.004 · Credential Stuffing

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cacti cacti < 1.2.31 affected
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I. Basic Information for CVE-2026-49442

Vulnerability Information
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Vulnerability Title
Cacti: User Enumeration via Error Messages
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
响应差异性信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cacti cacti < 1.2.31 -

II. Public POCs for CVE-2026-49442

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III. Intelligence Information for CVE-2026-49442

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Patches & Fixes for CVE-2026-49442 (1)

Vendor Advisories for CVE-2026-49442 (1)

Same Patch Batch · Cacti · 2026-10-23 · 3 CVEs total

CVE-2026-39902 7.2 HIGH Cacti: Authenticated RCE on Data Input
CVE-2026-46531 5.5 MEDIUM Cacti: Authenticated Stored 2nd-Order SQL Injection in automation_tree_rule_items.field (i

IV. Related Vulnerabilities

Same product: cacti
Same vendor: Cacti
Same weakness: CWE-204

V. Comments for CVE-2026-49442

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