LibreNMS Patches XSS Vulnerability
An XSS flaw in LibreNMS versions 25.12.0 to before 26.3.0 lets attackers inject remote code via indirect scripting.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
ANSSI issued an advisory regarding a cross-site scripting (XSS) vulnerability discovered in LibreNMS, an open-source network monitoring platform. The flaw, tracked as CVE-2026-2728, affects versions from 25.12.0 up to but not including 26.3.0, and allows an attacker to perform indirect remote code injection through the web interface.
No evidence of active exploitation is mentioned in the advisory. LibreNMS has published a security advisory (GHSA-5gm9-622f-qcg5) detailing the fix, and administrators are urged to upgrade to version 26.3.0 or later to remediate the issue.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0562
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