CPANSA-Spreadsheet-XLSX-2026-115943: Spreadsheet-XLSX vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-10-29T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-10-29T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | Severity | ||
| Original language | Language | en | |
| Also referred to | |||
Vulnerability 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.
Vulnerabilities
CVE-2026-115943
Vulnerability DescriptionSpreadsheet::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.
| Weakness | CWE-95 : Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') |
|---|
Product status
Known affected
| Product | Score | ||||
|---|---|---|---|---|---|
| Spreadsheet-XLSX less than 0.19 |
|
Fixed
- Spreadsheet-XLSX greater than or equal 0.19
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-Spreadsheet-XLSX-2026-115943 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-spreadsheet-xlsx-2026-115943.json - https://metacpan.org/release/ASB/Spreadsheet-XLSX-0.19/changes external
https://metacpan.org/release/ASB/Spreadsheet-XLSX-0.19/changes - http://www.openwall.com/lists/oss-security/2026/10/30/3 external
http://www.openwall.com/lists/oss-security/2026/10/30/3 - CVE-2026-115943 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-115943
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Thu Oct 29 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/