VulnerabilityAnalyzed
CVE-2026-27016
Versions 24.10.0 through 26.1.1 are vulnerable to Stored XSS via the unit parameter in Custom OID.
MEDIUM 5.4EPSS 0.23%
Does this matter?
Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own.
Description
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 24.10.0 through 26.1.1 are vulnerable to Stored XSS via the unit parameter in Custom OID. The Custom OID functionality lacks strip_tags() sanitization while other fields (name, oid, datatype) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping. This issue is fixed in version 26.2.0.
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79, CWE-116
- Affected
- librenms/librenms
- Source
- security-advisories@github.com
References
- https://github.com/librenms/librenms/commit/3bea263e02441690c01dea7fa3fe6ffec94af335Patch
- https://github.com/librenms/librenms/pull/19040Issue Tracking
- https://github.com/librenms/librenms/releases/tag/26.2.0Product, Release Notes
- https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55gThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.