CVE-2026-107223

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, flatCols expands file-loaded column ranges without validating Min and Max against the worksheet column limit. SetColWidth reaches flatCols, which expands xlsxCol.Min through xlsxCol.Max without enforcing MaxColumns. When a crafted worksheet supplies an oversized col max attribute and the application invokes a column mutator, flatCols performs a deep copy and append for every attacker-selected column number, allowing an attacker to consume excessive CPU and memory or trigger OOM. No fixed version is available as of this review.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/qax-os/excelize/commit/a54c578af309fa81f448143ed2b7a91192cc58a7	Patch
https://github.com/qax-os/excelize/pull/2370	Issue Tracking Patch
https://github.com/qax-os/excelize/security/advisories/GHSA-fq3v-74gv-27gm	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*

History

13 Oct 2026, 14:18

Type	Values Removed	Values Added
References	~~() https://github.com/qax-os/excelize/commit/a54c578af309fa81f448143ed2b7a91192cc58a7 -~~	() https://github.com/qax-os/excelize/commit/a54c578af309fa81f448143ed2b7a91192cc58a7 - Patch
References	~~() https://github.com/qax-os/excelize/pull/2370 -~~	() https://github.com/qax-os/excelize/pull/2370 - Issue Tracking, Patch
References	~~() https://github.com/qax-os/excelize/security/advisories/GHSA-fq3v-74gv-27gm -~~	() https://github.com/qax-os/excelize/security/advisories/GHSA-fq3v-74gv-27gm - Exploit, Vendor Advisory
First Time		Excelize excelize Excelize
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CPE		cpe:2.3:a:excelize:excelize::::::go::*

07 Oct 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-07 19:17

Updated : 2026-10-13 14:18

NVD link : CVE-2026-107223

Mitre link : CVE-2026-107223

CVE.ORG link : CVE-2026-107223

JSON object : View

Products Affected

excelize

excelize

CWE

CWE-789

Memory Allocation with Excessive Size Value

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