Spreadsheet::XLSX up to 0.18 ExcelFmt os command injection

Summaryinfo

A vulnerability classified as critical was found in Spreadsheet::XLSX up to 0.18. Affected by this issue is some unknown functionality of the component ExcelFmt. Such manipulation leads to os command injection. This vulnerability is uniquely identified as CVE-2026-115943. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Spreadsheet::XLSX up to 0.18 and classified as critical. Affected by this issue is an unknown function of the component ExcelFmt. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at metacpan.org. This vulnerability is handled as CVE-2026-115943 since 10/23/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 0.19 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-113403). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• Spreadsheet::XLSX

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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