Spreadsheet::XLSX: code exec

Spreadsheet-XLSX

Code execution vulnerability in Spreadsheet::XLSX Perl module

Do this now

Upgrade Spreadsheet::XLSX to version 0.19 or later to fix the code execution vulnerability.

Fix it

Upgrade to Spreadsheet-XLSX 0.19

First seen: 30 Oct 2026
Last update: 30 Oct 2026, 01:17 UTC
Fixed in: 0.19
Identifiers: CVE-2026-115943
Source: news

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## Spreadsheet::XLSX: code exec
Severity: unknown. Patch status: patched.
Affected: Spreadsheet-XLSX
Fixed in: 0.19
Ids: CVE-2026-115943

Code execution vulnerability in Spreadsheet::XLSX Perl module

## Steps
1. Search the repo, its CI and infra config for Spreadsheet-XLSX. If present, report the version in use and whether it's affected.
2. Fix by release line: Spreadsheet-XLSX: 0.19.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| Spreadsheet-XLSX | fixed | 0.19 | — |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-115943") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://seclists.org/oss-sec/2026/q4/439
https://pwned.coffee/i/spreadsheet-xlsx-code-exec-cve-2026-115943

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
Spreadsheet-XLSX before 0.19 0.19 CVE record (CNA) checked 30 Oct
Score: No CVSS published yet: severity unknown.
Last checked: 30 Oct 2026, 02:18 UTC

Product	Affected	Fixed in	Source
Spreadsheet-XLSX	before 0.19	0.19	CVE record (CNA) checked 30 Oct

Sources: KEV – CVE record ✓ Vendor ✓

Sources

seclists.org: CVE-2026-115943: Spreadsheet::XLSX versions before 0.19 for Perl allow code execution via string eval of number format conditions in ExcelFmt

Wrong fix version, or a source we missed? Send it back to chef@pwned.coffee with the source, and we'll correct it here.

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