{"id":"CVE-2026-86889","title":"A certificate validation issue was addressed with improved certificate validation","summary":"A certificate validation issue was addressed with improved certificate validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker in a privileged network position may be able to intercept n…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-295"],"vendor":"apple","product":"macos","affected":["macos >= 15.0, < 15.8","macos >= 26.0, < 26.7"],"patched":["macos 26.7"],"published":"2026-09-14","updated":"2026-09-16","sourceUpdated":"2026-09-16T01:03:23.290","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86889","references":[{"url":"https://support.apple.com/en-us/149035","label":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/149042","label":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/149043","label":"product-security@apple.com"}],"tags":["nvd","cve.org"],"epss":0.00188,"epssPercentile":0.08699,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T15:23:35.770442Z"},"ingestedAt":"2026-09-14T21:15:17.494Z","slug":"CVE-2026-86889","body":"## Overview\n\nA certificate validation issue was addressed with improved certificate validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker in a privileged network position may be able to intercept network traffic.\n\n## Affected\n\n- `macos >= 15.0, < 15.8`\n- `macos >= 26.0, < 26.7`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `macos 26.7`","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":203791,"id":"CVE-2026-86889","ts":1789486792634,"field":"cvss","old":null,"new":"4.8"},{"seq":203790,"id":"CVE-2026-86889","ts":1789486792634,"field":"severity","old":"none","new":"medium"}]}