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Advisories

ExcelJS through 4.4.0 ReDoS via slideFormula Shared Formula Translation

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Severity
medium
Date
Affecting

  • exceljs <= 4.4.0

CWE
  • CWE-1333 Inefficient Regular Expression Complexity
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
Matéo Florian Callec
Description
ExcelJS through 4.4.0 contains a regular expression denial of service vulnerability in slideFormula in lib/utils/shared-formula.js when translating shared formulas to child cells. Attackers can supply a crafted spreadsheet with very long master formulas, such as runs of hyphens, causing quadratic regex backtracking that blocks the Node.js event loop.

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