---
title: "CVE-2026-107223: Excelize - Denial of Service"
description: "Excelize 2.1.0 to 2.11.0 contains a denial of service caused by improper validation of column range limits in flatCols, letting attackers consume excessive CPU and memory via crafted worksheet columns, exploit requires invoking a column mutator."
url: https://panop.io/threat-heartbeat/CVE-2026-107223/
---

# CVE-2026-107223 Excelize - Denial of Service

Excelize 2.1.0 to 2.11.0 contains a denial of service caused by improper validation of column range limits in flatCols, letting attackers consume excessive CPU and memory via crafted worksheet columns, exploit requires invoking a column mutator.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

EPSS

0.34% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-107223)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-789](https://cwe.mitre.org/data/definitions/789.html)

## Vendor fix

Update to the latest version once a fix is available.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-107223](https://nvd.nist.gov/vuln/detail/CVE-2026-107223)
- [https://github.com/qax-os/excelize/commit/a54c578af309fa81f448143ed2b7a91192cc58a7](https://github.com/qax-os/excelize/commit/a54c578af309fa81f448143ed2b7a91192cc58a7)
- [https://github.com/qax-os/excelize/pull/2370](https://github.com/qax-os/excelize/pull/2370)
- [https://github.com/qax-os/excelize/security/advisories/GHSA-fq3v-74gv-27gm](https://github.com/qax-os/excelize/security/advisories/GHSA-fq3v-74gv-27gm)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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