{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-84191 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-84191 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-84191 is a medium-severity cross-site scripting vulnerability in librenms, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-84191 and fix it if it is affected.\n\nWhat it is: CVE-2026-84191 is a medium-severity cross-site scripting vulnerability in librenms, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-84191 in the wild and no public exploit code.\n\nAffected product: librenms. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-84191/ (Markdown: https://insights.sbomify.com/CVE-2026-84191/index.md)","id":"CVE-2026-84191","markdown":"https://insights.sbomify.com/CVE-2026-84191/index.md","name":"CVE-2026-84191","record":{"aliases":["GHSA-3cvh-rhc6-7rhc","GHSA-g993-wffj-m3gv"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Network monitoring system","requires_auth":"none","summary":"Attackers controlling monitored devices can inject JavaScript via SNMP fields, executing code in administrators' browsers viewing VRF pages.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"LibreNMS before 26.5.0 contains stored cross-site scripting vulnerabilities in VRF display pages where mplsVpnVrfDescription, vrf_name, and mplsVpnVrfRouteDistinguisher fields from SNMP polling are rendered without sanitization. Attackers controlling a monitored network device can inject arbitrary JavaScript through SNMP responses that executes in the browser of any user viewing VRF-related pages.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"LibreNMS before 26.5.0 Stored XSS via SNMP VRF fields","id":"CVE-2026-84191","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data","id":"CVE-2026-84192"},"packages":[],"prev":{"headline":"LibreNMS before 26.5.0 Remote Code Execution via AboutController","id":"CVE-2026-84190"},"products":["librenms"],"published":"2026-09-01","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-01","vendors":["librenms"]},"summary":"Attackers controlling monitored devices can inject JavaScript via SNMP fields, executing code in administrators' browsers viewing VRF pages.","url":"https://insights.sbomify.com/CVE-2026-84191/"}