# CVE-2026-115943: libspreadsheet-xlsx-perl: Spreadsheet::XLSX versions before 0.19 for Perl allow code execution via string eval of number format conditions in E...

CVE-2026-115943 is fixed in libspreadsheet-xlsx-perl on 1 platform by DEBIAN-CVE-2026-115943 (version 0.20-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-115943
- Priority: Urgent
- CVSS: 9.8 (critical)
- EPSS: 0.0061
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 29, 2026

## Description

Spreadsheet::XLSX versions before 0.19 for Perl allow code execution via string eval of number format conditions in ExcelFmt.  When a number format has a condition such as [>100], ExcelFmt chooses the format section by passing the condition and the cell value to a string eval. Both come from the workbook, and the eval runs while Spreadsheet::XLSX->new parses it.  An attacker who supplies an XLSX file can run arbitrary Perl code.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libspreadsheet-xlsx-perl Debian 14 | 0.20-1 | [DEBIAN-CVE-2026-115943](https://patchblox.com/security/data/fix/linux/debian-cve-2026-115943.md) | Nov 3, 2026 |

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Data as of 2026-11-10T07:50:38Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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