CVE-2026-128344

HIGHCVSS 7.51% EPSS

ExcelJS through 4.4.0 contains a memory exhaustion vulnerability that allows attackers to crash applications by supplying a workbook with an unbounded image anchor column in the drawing part. Attackers can set an anchor column such as 300000000 in xl/drawings/drawing1.xml so reading getImages() anchor positions makes Worksheet.getColumn allocate millions of Column objects and abort with a heap out-of-memory error.

Published 2026-11-13 · last modified 2026-11-13

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Ncerio by BeyondNets · data from NVD, CISA KEV, EPSS.