Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-39894— Cacti: RRDtool metric shift via LC_NUMERIC locale comma decimal formatting

CVSS 2.9 · Low EPSS 0.15% · P4

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProductVersion RangeStatus
Cacticacti< 1.2.31affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-39894

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Cacti: RRDtool metric shift via LC_NUMERIC locale comma decimal formatting
Source: CVE Program / CVE List V5
Vulnerability Description
Cacti is an open source performance and fault management framework. In versions 1.2.30 and below, the locale-dependent decimal formatting in rrdtool_function_update() can corrupt RRDtool metric values. The rrdtool_function_update() function checks metric values with is_numeric() and concatenates them into the RRDtool update command via PHP string interpolation. PHP's string cast of floats is locale-sensitive: if LC_NUMERIC uses comma as decimal separator (e.g., de_DE), a value of 1.5 becomes "1,5". RRDtool expects . as decimal separator, causing metric data to shift into wrong columns or be silently dropped. No setlocale() reset is present in the update path. This causes a data integrity issue, but is not remotely exploitable; it requires server locale misconfiguration. The issue has been fixed in version 1.2.31.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用具有不一致性实现的函数
Source: CVE Program / CVE List V5
Vulnerability Title
Cacti 处理逻辑错误漏洞
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及之前版本存在处理逻辑错误漏洞，该漏洞源于rrdtool_function_update()中的区域相关性十进制格式化问题，导致RRDtool指标值损坏，影响数据完整性。
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

VendorProductAffected VersionsCPESubscribe
Cacticacti < 1.2.31 -

II. Public POCs for CVE-2026-39894

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-39894

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-39894 (1)

Vendor Advisories for CVE-2026-39894 (2)

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

CVE-2026-399559.8 CRITICALCacti has Pre-Authentication SQL Injection via unanchored FILTER_VALIDATE_REGEXP in graph
CVE-2026-398939.8 CRITICALCacti: Pre-authentication SQL injection via rfilter RLIKE clause in graph_view.php
CVE-2026-399389.8 CRITICALCacti: Unauthenticated RCE on Graph Image
CVE-2026-399517.6 HIGHCacti: Stored SQL Injection via graph_name_regexp in Reports feature
CVE-2026-39900Cacti: Reflected XSS via tab parameter in auth_profile.php JavaScript context
CVE-2026-39897Cacti has a Reflected XSS Vulnerability via html_auth_footer
CVE-2026-39948Cacti has SQL Injection via rfilter parameter in RLIKE clauses
CVE-2026-39899Cacti: Path Traversal via filename parameter in package_import.php
CVE-2026-40079Cacti: Command Injection via escape_command() no-op in RRDtool execution

IV. Related Vulnerabilities

Same product: cacti
Same vendor: Cacti
Same weakness: CWE-474

V. Comments for CVE-2026-39894

No comments yet

Leave a comment