CVE-2026-54063: high-severity vulnerability in qax-os excelize
Excelize: Unbounded Row Index Allocation in Worksheet Parser (checkSheet OOM/Panic DoS)
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.6%
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled <row r="N"> XML attribute value directly as the length argument to make([]xlsxRow, row) without validating it against the Excel row limit (TotalRows = 1,048,576). A specially crafted XLSX file can trigger two denial-of-service variants: (A) an out-of-memory process kill when r=2147483647 forces a ~16 GB allocation attempt, and (B) a runtime panic via out-of-bounds slice indexing when r=-1. Any service that opens attacker-supplied XLSX files and calls GetCellValue is affected. No authentication is required. This issue is fixed in version 2.11.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
qax-os · excelizeRelated CVEs — qax-os excelize
In the same product, most dangerous first.
CVE-2026-59162MEDIUMExcelize: Negative shared-string index causes panic in GetCellValue and GetRowsEPSS 0.7%CVE-2026-59161HIGHExcelize: Streaming GetRows row-bound bypass causes attacker-controlled allocationEPSS 0.7%CVE-2026-107216HIGHExcelize ANCHORARRAY: mutually-referencing array formulas recurse unboundedly via re-entrant CalcCellValue, causing a fatal stack overflowEPSS 0.4%CVE-2026-107223HIGHExcelize: Unbounded <col max> attribute is loaded with no MaxColumns check and expanded per-column by flatCols(), so any column mutator hangs or OOMs the processEPSS 0.4%CVE-2026-107219HIGHExcelize: Unbounded spinCount in agile decryption burns CPU during OpenFileEPSS 0.4%CVE-2026-107217HIGHExcelize ColumnNameToNumber: int64 overflow yields an out-of-domain coordinate with nil error, causing negative slice index panic on r="0" rowsEPSS 0.4%