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CVE-2026-78206

HIGH NVD
CVSS Score
7.5
Severity
HIGH
Source
NVD
Published
Aug 24, 2026
Description

exceljs-hardened before 5.0.0 decompresses all entries from supplied xlsx archives into memory without limits on entry size, total size, or compression ratio. Attackers can upload highly compressed workbooks that expand to gigabytes in memory, exhausting available resources and causing denial of service.

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