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CVE-2026-39938— Cacti: Unauthenticated RCE on Graph Image

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团队开源的一款日志分析与审计软件。 Cacti 1.2.30及之前版本存在安全漏洞，该漏洞源于通过graph_theme和rrdtool IPC序列化问题导致的路径遍历，可能造成未经身份验证的攻击者利用本地文件包含。

CVSS 9.8 · Critical EPSS 0.69% · P52

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cacti cacti < 1.2.31 affected
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I. Basic Information for CVE-2026-39938

Vulnerability Information
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Vulnerability Title
Cacti: Unauthenticated RCE on Graph Image
Source: CVE Program / CVE List V5
Vulnerability 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.
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
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Cacti 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cacti是Cacti团队开源的一款日志分析与审计软件。 Cacti 1.2.30及之前版本存在安全漏洞，该漏洞源于通过graph_theme和rrdtool IPC序列化问题导致的路径遍历，可能造成未经身份验证的攻击者利用本地文件包含。
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-2026-39938

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9344 chars
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III. Intelligence Information for CVE-2026-39938

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Patches & Fixes for CVE-2026-39938 (2)

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-2026-39893 9.8 CRITICAL Cacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php
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-22

V. Comments for CVE-2026-39938

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