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Advisory record · GHSA-7gww-x7fh-jf9j

LibreNMS: SSRF-driven stored XSS via Oxidized API response fields in device showconfig page

CVSS 9.2 CriticalCriticalEPSS 0.0038 · 32nd percentile

Critical, because:

  • CVSS score 9.2: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 18 Aug 2026, 21:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
librenms/librenmsPackagist<26.7.026.7.0
Identifiers
GHSA-7gww-x7fh-jf9j · CVE-2026-84189 · PKSA-9d1b-7dzj-kkfs
Weakness (CWE)
CWE-79 · CWE-918
Tags
Published
18 Aug 2026
Updated
2 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

LibreNMS versions before 26.7.0 (Packagist librenms/librenms) render JSON fields returned by the configured Oxidized integration URL into the device showconfig page without HTML escaping, enabling stored cross-site scripting. An attacker needs admin access to set the Oxidized URL to a server they control, after which any user who views a device's showconfig tab can have script run in their browser. Upgrade to LibreNMS 26.7.0 or later, which the source lists as the fixed version.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.2 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0038, the 32nd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:06 UTC First seen by agentprime
  2. 31 Oct 2026, 14:06 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.