Answer in brief
CVE-2026-84190 records a High severity (CVSS 8.7) vulnerability in LibreNMS before 26.5.0 Remote Code Execution via AboutController. The current sources do not mark it as known exploited. The current feed maps librenms/librenms (composer), librenms/librenms (generic), librenms/librenms (packagist). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps librenms/librenms (composer), librenms/librenms (generic), librenms/librenms (packagist). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| librenms/librenmscomposer | <26.5.0 | 26.5.0 |
| librenms/librenmsgeneric | >=0 <26.5.0 | 26.5.0 |
| librenms/librenmspackagist | >=0 <26.5.0 | 26.5.0 |
Published upstream
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 18, 2026
LibreNMS versions before 26.5.0 contain a remote code execution vulnerability in the AboutController where the snmpget configuration parameter is passed to shell_exec() without proper validation. An authenticated administrator can modify the snmpget configuration to point to a malicious executable file and trigger code execution by accessing the /about endpoint.
Quoted source text, attributed separately from HOL analysis.