CVE-2026-6204 json
LibreNMS is Vulnerable to Remote Code Execution by Arbitrary File Write
published 2026-03-26 7 mo ago modified 2026-06-17 4 mo ago also GHSA-pr3g-phhr-h8fh , EUVD-2026-21908
- cvss
- 7.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 7.5%
- EPSS 7.5% chance of exploitation in 30 days, percentile 94%
- public exploits
- 0
- none known
Summary
LibreNMS versions before 26.3.0 are affected by an authenticated remote code execution vulnerability by abusing the Binary Locations config and the Netcommand feature. Successful exploitation requires administrative privileges. Exploitation could result in compromise of the underlying web server.
Patch / fix
- packagist librenms/librenms 26.3.0
- librenms librenms 26.3.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
7.53% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- projectblack.io https://projectblack.io/blog/librenms-authenticated-rce-and-xss/#binary-path-rce-poc referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.5 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.5 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | librenms/librenms | >=1.48, <26.3.0 |
26.3.0 |
Affected products
- librenms librenms
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
projectblack.io
/blog/librenms-authenticated-rce-and-xss/#binary-path-rce-poc
exploit, web, third-party-advisory
-
github.com
/librenms/librenms/security/advisories/GHSA-pr3g-phhr-h8fh
vendor-advisory, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-6204
advisory
-
github.com
/librenms/librenms
package
-
github.com
/librenms/librenms/blob/master/app/Providers/AppServiceProvider.php#L169
web
Sources
- CVE List CVE-2026-6204
- GitHub Advisory GHSA-pr3g-phhr-h8fh
- NVD CVE-2026-6204
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