CVE-2026-26989

Summary

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are affected by a Stored Cross-Site Scripting (XSS) vulnerability in the Alert Rules workflow. An attacker with administrative privileges can inject malicious scripts that execute in the browser context of any user who accesses the Alert Rules page. This issue has been fixed in version 26.2.0.

Affected Software

Weaknesses

• CWE-79: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/librenms/librenms/security/advisories/GHSA-6xmx-xr9p-58p7
• https://github.com/librenms/librenms/pull/19039
• https://github.com/librenms/librenms/commit/087608cf9f851189847cb8e8e5ad002e59170c58
• https://github.com/librenms/librenms/releases/tag/26.2.0

• ←Previous
• Next→