Vulnerability · Published Oct 7, 2026 · Assigned by GitHub_M

CVE-2026-107217Excelize ColumnNameToNumber: int64 overflow yields an out-of-domain coordinate with nil error, causing negative slice index panic on r="0" rows

High 7.5

In plain English

A high-severity integer overflow in excelize from qax-os. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 69.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.0.0 to 2.11.0 in github.com/xuri/excelize/v2 and from 1.1.0 to 1.4.1 in github.com/xuri/excelize, ColumnNameToNumber accumulates a bijective base-26 value in int64 without detecting overflow, allowing an invalid long column name to wrap to zero with no error. ColumnNameToNumber accepts the overflowing name VGWQHXLSDVIKWV, after which checkSheetR0 and xlsxWorksheet.checkRow use the wrapped column value as an index. When a crafted worksheet uses an overflowing column name in a row normalized by checkSheetR0 or checkRow, the wrapped zero column becomes a negative slice index during worksheet normalization, allowing an attacker to panic and terminate the calling process. No fixed version is available as of this review.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/xuri/excelize	no fix listed	GHSA-c85p-xxjj-2r75
Go	github.com/xuri/excelize	no fix listed	GO-2026-6677
Go	github.com/xuri/excelize/v2	2.11.1-0.20260910071107-696050fbf14e	GHSA-c85p-xxjj-2r75
Go	github.com/xuri/excelize/v2	2.11.1-0.20260910071107-696050fbf14e	GO-2026-6677

Affected products (as reported)

Vendor	Product	Versions
qax-os	excelize	>= 2.0.0, <= 2.11.0>= 1.1.0, <= 1.4.1

Weakness: CWE-190, CWE-129 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/qax-os/excelize/security/advisories/GHSA-c85p-xxjj-2r75 x_refsource_CONFIRM
https://github.com/qax-os/excelize/pull/2394 x_refsource_MISC
https://github.com/qax-os/excelize/commit/696050fbf14e74e96a58eef2b16aaf72f381a6a8 x_refsource_MISC