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CVE-2026-107224— Excelize: A Zip64 uncompressed-size of 2^63 panics OpenFile/OpenReader

Quick assessment

Affected
qax-os excelize
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Excelize 是一个用于读取和写入 Microsoft Excel 电子表格的 Go 语言库。在版本 2.1.0 至 2.11.0 之间，当 ZIP64 格式的未压缩大小的高位（high bit）被设置时，该值会从 uint64 类型转换为负的 int64 类型，随后在进行有符号大小限制检查和内存分配时，使用了这个错误的负值。具体而言， 通过 获取 ，并将包装后的负值传递给 函数。当一个精心构造的 ZIP64 条目声明其未压缩大小为 2^63 至 2^64-1 之间的值，且用户打开该工作簿时，该负值会绕过解压大

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
qax-os excelize >= 2.1.0, <= 2.11.0 affected
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I. Basic Information for CVE-2026-107224

Vulnerability Information
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Vulnerability Title
Excelize: A Zip64 uncompressed-size of 2^63 panics OpenFile/OpenReader
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
qax-os excelize >= 2.1.0, <= 2.11.0 -

II. Public POCs for CVE-2026-107224

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III. Intelligence Information for CVE-2026-107224

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Other References for CVE-2026-107224 (3)

Same Patch Batch · qax-os · 2026-10-07 · 15 CVEs total

CVE-2026-107211 8.7 HIGH Excelize: Unchecked pivot-cache field index in extractPivotTableFields causes unrecoverabl
CVE-2026-107213 8.7 HIGH Excelize: Nil-pointer dereference in GetSlicers when a worksheet has extLst present but no
CVE-2026-107212 7.5 HIGH Excelize: Unbounded row number in Rows.Columns makes GetRows and the Rows iterator loop fo
CVE-2026-107214 7.5 HIGH Excelize Decrypt: unrecoverable panics on malformed OLE/CFB encrypted workbooks
CVE-2026-107216 7.5 HIGH Excelize ANCHORARRAY: mutually-referencing array formulas recurse unboundedly via re-entra
CVE-2026-107215 7.5 HIGH Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers
CVE-2026-107217 7.5 HIGH Excelize ColumnNameToNumber: int64 overflow yields an out-of-domain coordinate with nil er
CVE-2026-107219 7.5 HIGH Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile
CVE-2026-107223 7.1 HIGH Excelize: Unbounded <col max> attribute is loaded with no MaxColumns check and expanded pe
CVE-2026-107220 6.5 MEDIUM Excelize: Panic in cellInRange on a worksheet with an empty mergeCell ref
CVE-2026-107221 6.5 MEDIUM Excelize: a row whose earlier cell has a higher column reference than its last cell panics
CVE-2026-107222 6.5 MEDIUM Excelize: GetConditionalFormats indexes conditional-formatting rule sub-elements with no l
CVE-2026-107225 6.5 MEDIUM Excelize: GetStyle panics on a negative fillId, borderId or fontId in styles.xml
CVE-2026-107218 5.3 MEDIUM Excelize: RIGHT() on supplementary-plane text slices with a negative index and panics

IV. Related Vulnerabilities

Same product: excelize
Same vendor: qax-os
Same weakness: CWE-190

V. Comments for CVE-2026-107224

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