CVE Watch13 oct 2026

CVE-2026-107224

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, a Zip64 uncompressed size with

CVSS

6.5

Medio

EPSS

0.3%

p22

KEV

—

Exploit Today

0-100

Publicado: 7 oct 2026 · Última mod.: 13 oct 2026 · CWE-190 · CWE-681

EPSS · 30d

0.3%EPSS · 30 días0.4%

2026-10-082026-10-19

Descripción técnica

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, a Zip64 uncompressed size with the high bit set is converted from uint64 to a negative int64 before signed size-limit checks and allocation. ReadZipReader obtains UncompressedSize64 through FileInfo.Size and passes the wrapped negative value to readFile. When a crafted Zip64 entry declares an uncompressed size from 2^63 through 2^64-1 and the workbook is opened, the negative size bypasses unzip limits and reaches make as a negative capacity, allowing an attacker to panic during workbook opening. No fixed version is available as of this review.

Referencias oficiales

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