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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-86427— LibreNMS before 26.8.0 Argument Injection via graph_title

Quick assessment

Affected
librenms librenms
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.

LibreNMS是LibreNMS社区开源的一款网络监控系统。 LibreNMS 26.8.0之前版本存在命令注入漏洞，该漏洞源于graph_title参数中的参数注入问题，允许通过双引号转义注入任意rrdtool参数，可能造成未经授权的设备信息泄露或执行任意rrdtool命令，绕过设备权限校验。

CVSS 8.8 · High EPSS 0.60% · P48

Affected Version Matrix 2

VendorProduct Version RangeStatus
librenms librenms < 26.8.0 affected
26.8.0 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-86427

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
LibreNMS before 26.8.0 Argument Injection via graph_title
Source: CVE Program / CVE List V5
Vulnerability Description
LibreNMS before 26.8.0 contains an argument injection vulnerability in the graph_title parameter that allows authenticated attackers to inject arbitrary rrdtool arguments by breaking out of double-quote escaping. Attackers can inject DEF and LINE arguments to read RRD files from unauthorized devices, or use newline injection to execute arbitrary rrdtool commands, bypassing per-device authorization checks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
LibreNMS 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreNMS是LibreNMS社区开源的一款网络监控系统。 LibreNMS 26.8.0之前版本存在命令注入漏洞，该漏洞源于graph_title参数中的参数注入问题，允许通过双引号转义注入任意rrdtool参数，可能造成未经授权的设备信息泄露或执行任意rrdtool命令，绕过设备权限校验。
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
librenms librenms 0 ~ 26.8.0 -

II. Public POCs for CVE-2026-86427

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-86427

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-86427 (2)

IV. Related Vulnerabilities

Same product: librenms
Same vendor: librenms
Same weakness: CWE-77

V. Comments for CVE-2026-86427

No comments yet

Leave a comment