PT-2026-20981 · Librenms · Librenms

Murrant · Published 2026-02-20 · Updated 2026-02-20 · CVE-2026-26987

Positive Technologies · (AI Summary)

CVSS v3.1

6.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions LibreNMS versions 25.12.0 and below

Description LibreNMS is a network monitoring tool susceptible to Reflected Cross-Site Scripting (XSS) attacks. The issue occurs through the email field. This impacts versions prior to 26.2.0.

Recommendations Update to version 26.2.0 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-26987

GHSA-GQX7-99JW-6FPR

Affected Products

Librenms

References · 8

• 🔥 https://github.com/librenms/librenms/security/advisories/GHSA-gqx7-99jw-6fpr · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26987.json · Exploit
• https://github.com/librenms/librenms/commit/8e626b38ef92e240532cdac2ac7e38706a71208b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-26987 · Security Note
• https://osv.dev/vulnerability/CVE-2026-26987 · Vendor Advisory
• https://github.com/librenms/librenms/pull/19038 · Note
• https://github.com/librenms/librenms/releases/tag/26.2.0 · Note
• https://twitter.com/VulmonFeeds/status/2024696761084789230 · Twitter Post