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CVE-2026-115943unknown

Spreadsheet::XLSX versions before 0.19 for Perl allow code execution via string eval of number format conditions in ExcelFmt

Impact

Spreadsheet::XLSX versions before 0.19 for Perl may allow code execution via string eval of number format conditions in ExcelFmt, potentially letting an attacker run arbitrary Perl code by supplying an XLSX file. The weakness is due to improper neutralization of directives in dynamically evaluated code. An attacker needs to supply a malicious XLSX file.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

What to do

Upgrade to Spreadsheet-XLSX 0.19 or later.

CPANSec guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Vendor not supplied · CPANSec

Spreadsheet-XLSX

1 range
CPANSec version evidence

Package identity

pkg:cpan/Spreadsheet-XLSX

Identity supplied by CPANSec. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 0.19

custom versions

unaffected

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-115943

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-95 ↗

CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

CPANSec

Related →
Contributing organizations · 2
CPANSec

Assigning organization

2026-10-30
CVE

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-115943

    Observed 2026-10-30T02:31:47.395Z · upstream updated 2026-10-30T02:08:11.510Z

    References changed

    before

    [
  "https://metacpan.org/release/ASB/Spreadsheet-XLSX-0.19/changes"
]

    after

    [
  "https://metacpan.org/release/ASB/Spreadsheet-XLSX-0.19/changes",
  "http://www.openwall.com/lists/oss-security/2026/10/30/3"
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

2 sources
metacpan.org/release/ASB/Spreadsheet-XLSX-0.19/changes
release-notesCPANSec
www.openwall.com/lists/oss-security/2026/10/30/3
Security advisoryCVE