CVEvulnerability
CVE-2026-107224
6.5 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-10-07
- Last modified
- 2026-10-13
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-190, CWE-681
Description
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.1.0 to 2.11.0, a Zip64 uncompressed size with the high bit set is converted from uint64 to a negative int64 before signed size-limit checks and allocation. ReadZipReader obtains UncompressedSize64 through FileInfo.Size and passes the wrapped negative value to readFile. When a crafted Zip64 entry declares an uncompressed size from 2^63 through 2^64-1 and the workbook is opened, the negative size bypasses unzip limits and reaches make as a negative capacity, allowing an attacker to panic during workbook opening. No fixed version is available as of this review.
Affected configurations
• excelize excelize (>= 2.1.0 <= 2.11.0)
Related
References
- https://github.com/qax-os/excelize/commit/db93f8d89de71589069a54d1b998af02e3c5f7cd Patch
- https://github.com/qax-os/excelize/pull/2369 Issue Tracking, Patch
- https://github.com/qax-os/excelize/security/advisories/GHSA-fw94-4wwp-w8pw Exploit, Vendor Advisory
- https://github.com/qax-os/excelize/security/advisories/GHSA-fw94-4wwp-w8pw Exploit, Vendor Advisory