{"schema":"threatline.record/2","record":{"id":"CVE-2026-86426","aliases":["GHSA-cvq8-gqfq-3mvg"],"summary":"LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion","details":"LibreNMS before 26.8.0 contains an authentication bypass vulnerability in the REST API that allows unauthenticated attackers to access protected endpoints by sending numeric values instead of string tokens. Attackers can exploit MySQL type coercion by sending small integers like 0 through 9 to match token hashes, gaining access to API functionality including device credentials and administrative features that enable remote code execution through alert templates.","categories":["Unclassified"],"product":"librenms","vendor":"librenms","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-86426","source_modified_at":"2026-09-08T13:39:33.066Z","fetched_at":"2026-10-25T05:59:55.871881Z","product":"librenms","vendor":"librenms","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"26.8.0"},{"version":"26.8.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"GitHub Advisory Database","source_url":"https://github.com/librenms/librenms/security/advisories/GHSA-cvq8-gqfq-3mvg","source_modified_at":"2026-09-09T08:31:31Z","fetched_at":"2026-10-25T05:59:55.871881Z","package":{"ecosystem":"","name":"LibreNMS"},"range":"<= 26.7.0"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-86426","source_modified_at":"2026-09-08T13:39:33.066Z","fetched_at":"2026-10-25T05:59:55.871881Z","package":{"name":"librenms","ecosystem":null},"version":"26.8.0","basis":"first unaffected version stated in the CVE record"},{"source":"GitHub Advisory Database","source_url":"https://github.com/librenms/librenms/security/advisories/GHSA-cvq8-gqfq-3mvg","source_modified_at":"2026-09-09T08:31:31Z","fetched_at":"2026-10-25T05:59:55.871881Z","package":{"ecosystem":"","name":"LibreNMS"},"version":"26.8.0"}],"cvss":9.2,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.0387,"percentile":0.90168,"score_date":"2026-10-24"},"published_at":"2026-09-07T12:53:47.884Z","modified_at":"2026-09-09T08:31:31Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-86426","fetched_at":"2026-10-25T05:59:55.871881Z","source_modified_at":"2026-09-08T13:39:33.066Z"},{"source":"GitHub Advisory Database","url":"https://github.com/librenms/librenms/security/advisories/GHSA-cvq8-gqfq-3mvg","fetched_at":"2026-10-25T05:59:55.871881Z","source_modified_at":"2026-09-09T08:31:31Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-86426.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-86426","fetched_at":"2026-10-25T05:59:55.871881Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","GitHub Advisory Database","Nuclei","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/librenms/librenms/security/advisories/GHSA-cvq8-gqfq-3mvg","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/librenms-before-26.8.0-authentication-bypass-via-api-token-type-confusion","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-09-08T13:38:14.229547Z"},"exploits":[{"kind":"Scanner template","name":"LibreNMS <= 26.7.0 - Unauthenticated API Access","source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-86426.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-09T08:31:31Z","content_hash":"f0459a58ccd0164f7dcfe108f3ed0e26b29a9a57353263b2f35b497ff9b09fc4"}}