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VulnerabilityPublished

CVE-2026-115943: Spreadsheet::XLSX versions before 0.19 for Perl allow code execution via string eval of number

Source GCVE Database

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Authoritative record:CVE-2026-115943· High

Not known to be exploited : upgrade to 0.19 soon.

Data as of 30 Oct 2026, 04:31 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 0.19

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Spreadsheet-XLSX (Perl module) to 0.19.

Affected software

ProductAffectedFixed in
Spreadsheet-XLSXAffected
  • <0.19
Fixed in
  • 0.19
CPANSpreadsheet-XLSXpkg:cpan/Spreadsheet-XLSXOther threatsAffected
  • <0.19
Fixed in
  • 0.19

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, avoid processing untrusted XLSX files with vulnerable versions of Spreadsheet::XLSX.

Description

Spreadsheet::XLSX versions before 0.19 for Perl contain a vulnerability that allows arbitrary code execution. The flaw arises from the use of string eval on number format conditions in ExcelFmt during workbook parsing. An attacker can craft a malicious XLSX file with a specially formatted number condition to execute arbitrary Perl code when the file is processed.

References

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