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CVE-2026-39893— Cacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php

Quick assessment

Affected
Cacti cacti
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cacti是Cacti团队开源的一套开源的网络流量监测和分析工具。该工具通过snmpget来获取数据,使用RRDtool绘画图形进行分析,并提供数据和用户管理功能。 Cacti 1.2.30及之前版本存在SQL注入漏洞，该漏洞源于rfilter请求变量未经清理就连接到RLIKE SQL子句中，可能导致SQL注入攻击。

CVSS 9.8 · Critical EPSS 0.67% · P51

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cacti cacti < 1.2.31 affected
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I. Basic Information for CVE-2026-39893

Vulnerability Information
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Vulnerability Title
Cacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Cacti SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cacti是Cacti团队开源的一套开源的网络流量监测和分析工具。该工具通过snmpget来获取数据,使用RRDtool绘画图形进行分析,并提供数据和用户管理功能。 Cacti 1.2.30及之前版本存在SQL注入漏洞，该漏洞源于rfilter请求变量未经清理就连接到RLIKE SQL子句中，可能导致SQL注入攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cacti cacti < 1.2.31 -

II. Public POCs for CVE-2026-39893

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Qwen3.6-35B-A3B · 11984 chars
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III. Intelligence Information for CVE-2026-39893

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Patches & Fixes for CVE-2026-39893 (1)

Vendor Advisories for CVE-2026-39893 (1)

Same Patch Batch · Cacti · 2026-06-24 · 10 CVEs total

CVE-2026-39955 9.8 CRITICAL Cacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph
CVE-2026-39938 9.8 CRITICAL Cacti: Unauthenticated RCE on Graph Image
CVE-2026-39951 7.6 HIGH Cacti: Stored SQL Injection via graph_name_regexp in Reports feature
CVE-2026-39894 2.9 LOW Cacti: RRDtool metric shift via LC_NUMERIC locale comma decimal formatting
CVE-2026-39900 Cacti: Reflected XSS via tab parameter in auth_profile.php JavaScript context
CVE-2026-39897 Cacti has a Reflected XSS Vulnerability via html_auth_footer
CVE-2026-39948 Cacti has SQL Injection via rfilter parameter in RLIKE clauses
CVE-2026-39899 Cacti: Path Traversal via filename parameter in package_import.php
CVE-2026-40079 Cacti: Command Injection via escape_command() no-op in RRDtool execution

IV. Related Vulnerabilities

Same product: cacti
Same vendor: Cacti
Same weakness: CWE-89

V. Comments for CVE-2026-39893

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