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Advisories

exceljs through 4.4.0 Uncontrolled Resource Consumption via Unbounded xlsx Decompression

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severity
high
date
Affecting

  • exceljs <= 4.4.0

CWE
  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Matéo Florian Callec
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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