Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-107223

CVE-2026-107223HIGH

qax-os excelize — Excelize: Unbounded <col max> attribute is loaded with no MaxColumns check and expanded per-column by flatCols(), so any column mutator hangs or OOMs the process

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   P   N   N   H    7.1   .0034   26.5     —

AFFECTED
  Product   Versions               Fixed
  excelize  >= 2.1.0, <= 2.11.0 –  —

TIMELINE
  Oct 7   Reserved by GitHub_M
  Oct 7   Published (CNA: GitHub_M)
  Oct 13  EXPLOIT PUBLISHED — CVE-2026-107223 (qax-os excelize). Public exploit reference added.

CWE-789 · CNA: GitHub_M · CVSS v4.0 · 3 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
October 7, 2026	Reserved	Reserved by GitHub_M
October 7, 2026	Published	Published (CNA: GitHub_M)
October 13, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-107223 (qax-os excelize). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
qax-os	excelize	—	>= 2.1.0, <= 2.11.0	—

Weaknesses

CWE-789

References (3)

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]

Authoritative record: CVE-2026-107223 at cve.org

Vendors: qax-os

Weaknesses: CWE-789

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-107223 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.