CVE-2026-115943 Spreadsheet::XLSX versions before 0.19 for Perl allow code execution via string eval of number format conditions in ExcelFmt.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-115943?
CVE-2026-115943 is a vulnerability, published on 29 Oct 2026.
Official 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.
Weakness: CWE-95
Which versions are affected by CVE-2026-115943?
How do I fix CVE-2026-115943?
No fix has been published for CVE-2026-115943 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-115943 being exploited?
There is no known exploitation of CVE-2026-115943 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-115943, GHSA-h33r-pwjw-x33j.