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  4. CVE 2026 107223 excelize unbounded col max attribute is loaded
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Back to active CVEs
High · CVSS 7.1CVE-2026-107223GHSA-FQ3V-74GV-27GM

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 processCVE-2026-107223

Answer in brief

CVE-2026-107223 records a High severity (CVSS 7.1) vulnerability in 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. The current sources do not mark it as known exploited. The current feed maps qax-os/excelize (generic), github.com/xuri/excelize/v2 (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 7, 2026Updated Oct 7, 2026Source checked Oct 7, 2026First seen by HOL Oct 7, 2026Material review Oct 7, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-789
Source
CVE List V5
Source checked
Oct 7, 2026
References
4 linked sources
Open source record

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps qax-os/excelize (generic), github.com/xuri/excelize/v2 (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
qax-os/excelizegeneric>=2.1.0 <=2.11.0Not reported
github.com/xuri/excelize/v2go>=2.1.0,<2.11.1-0.20260807015645-a54c578af3092.11.1-0.20260807015645-a54c578af309

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for qax-os/excelize, github.com/xuri/excelize/v2.
  2. 2Review the reported fix. Update github.com/xuri/excelize/v2 to 2.11.1-0.20260807015645-a54c578af309 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 7, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 7, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 7, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Excelize: Unchecked pivot-cache field index in extractPivotTableFields causes unrecoverable panicSame qax-os/excelize package
  • Excelize: Unbounded row number in Rows.Columns makes GetRows and the Rows iterator loop for daysSame qax-os/excelize package
  • Excelize: Nil-pointer dereference in GetSlicers when a worksheet has extLst present but no drawing elementSame qax-os/excelize package
  • Excelize Decrypt: unrecoverable panics on malformed OLE/CFB encrypted workbooksSame qax-os/excelize package
  • Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers from CFB directory entries: remote panic / OOM DoSSame qax-os/excelize package
  • Excelize ANCHORARRAY: mutually-referencing array formulas recurse unboundedly via re-entrant CalcCellValue, causing a fatal stack overflowSame qax-os/excelize package