{"schema":"threatline.record/2","record":{"id":"CVE-2026-86871","aliases":[],"summary":"An integer underflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker with control of a network file server ","details":"An integer underflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker with control of a network file server may be able to cause unexpected system termination.","categories":["Operating systems"],"product":"macOS","vendor":"Apple","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-86871","source_modified_at":"2026-10-20T14:39:35.352Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"macOS","vendor":"Apple","versions":[{"version":"0","status":"affected","lessThan":"15.8","versionType":"custom"},{"version":"0","status":"affected","lessThan":"26.7","versionType":"custom"},{"version":"0","status":"affected","lessThan":"27","versionType":"custom"}],"defaultStatus":null}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-86871","source_modified_at":"2026-10-20T14:39:35.352Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"macOS","ecosystem":null},"version":"15.8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-86871","source_modified_at":"2026-10-20T14:39:35.352Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"macOS","ecosystem":null},"version":"26.7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-86871","source_modified_at":"2026-10-20T14:39:35.352Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"macOS","ecosystem":null},"version":"27","basis":"first unaffected version stated in the CVE record"}],"cvss":5.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.004,"percentile":0.33106,"score_date":"2026-10-23"},"published_at":"2026-10-20T00:50:43.774Z","modified_at":"2026-10-20T14:39:35.352Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-86871","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T14:39:35.352Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-86871","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://support.apple.com/en-us/149035"},{"source":"CVE List","url":"https://support.apple.com/en-us/149042"},{"source":"CVE List","url":"https://support.apple.com/en-us/149043"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-20T14:39:26.599060Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-20T14:39:35.352Z","content_hash":"3650a1d255ae6d3f2ac9ec99f15041f0d79740b8c5c222b501061c4b9004f72c"}}