CVE-2023-30533: Sheetjs

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

SheetJS Community Edition before 0.19.3 allows Prototype Pollution via a crafted file. In other words. 0.19.2 and earlier are affected, whereas 0.19.3 and later are unaffected.

Affected products

• Sheetjs Sheetjs: before 0.19.3 (fixed in 0.19.3)

Published 2023-04-24. Last modified 2026-06-17.