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https://support.apple.com/en-us/HT208397
macOS High Sierra 10.13.2 Supplemental Update
Released January 8, 2018
Available for: macOS High Sierra 10.13.2
Description: macOS High Sierra 10.13.2 Supplemental Update includes security improvements to Safari and WebKit to mitigate the effects of Spectre (CVE-2017-5753 and CVE-2017-5715).
Installing macOS High Sierra 10.13.2 Supplemental Update will update Safari to version 11.0.2 (13604.4.7.1.6) or version 11.0.2 (13604.4.7.10.6).