elwerene libreoffice-convert up to 1.8.1 Path Construction index.js path.join fileName path traversal

Summaryinfo

A vulnerability marked as critical has been reported in elwerene libreoffice-convert up to 1.8.1. The impacted element is the function path.join of the file index.js of the component Path Construction. This manipulation of the argument fileName causes path traversal. This vulnerability is tracked as CVE-2026-54732. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in elwerene libreoffice-convert up to 1.8.1 and classified as critical. Affected by this vulnerability is the function path.join of the file index.js of the component Path Construction. The manipulation of the argument fileName with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

libreoffice-convert is a Node.js module for converting office documents to different formats. Prior to 1.8.2, index.js uses the caller-controlled options.fileName value in path.join(tempDir.name, fileName) without reducing it to a base name. A filename containing ../ can escape the temporary directory because path.basename() normalization is missing and write the supplied document buffer to an arbitrary path writable by the process, including an SSH authorized_keys file, a cron configuration, or a web root. This issue is fixed in version 1.8.2.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-54732 since 06/16/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 1.8.2 eliminates this vulnerability.

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Productinfo

Type

• Office Suite Software

Vendor

• elwerene

Name

• libreoffice-convert

Version

• 1.8.0
• 1.8.1

Website

• Product: https://github.com/elwerene/libreoffice-convert/

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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