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Vendor

exceljs

4 known vulnerabilities.

Products

exceljs 4
All Critical High Medium Low Exploited only Public exploit

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  • Critical 9.4
    CVE-2026-78207

    exceljs through 4.4.0 Prototype Pollution via deepMerge Reached From Note Serialization

    exceljs through 4.4.0 contains a prototype pollution vulnerability in the deepMerge helper that fails to reject __proto__, constructor, or prototype keys when merging note objects. Attackers can assign parsed JSON with a malicious __proto__ property to cell n…

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