Recently LibXL 5.2 was released and we include this update in our upcoming MBS FileMaker Plugin for FileMaker.

Version 5.2.0 (2026-05-15)

• fixed the vulnerability CVE-2026-22184, updated zlib to the version 1.3.2
• added possibility to read data validations from xlsx files
• added possibility to remove filters from tables (xlsx)
• added the support for xlsx files in the Book::loadWithoutEmptyCells()
• fixed a bug with reading strings with incorrect character encoding in the XL.Sheet.CellReadText on Linux/MacOSX (xls)
• fixed an issue with loading some xls files with message "read error: record id can't be 0"
• fixed an issue with corrupting output files in the XL.Sheet.AutoFilter.SetSort function (xlsx)
• fixed the unhandled exception in the XL.Format.GetBorderLeftColor function (xlsx)

• XL.Sheet.DataValidation
• XL.Sheet.DataValidationSize
• XL.Sheet.IsAutoFilter
• XL.Sheet.RemoveFilter

Version 5.1.0 (2026-01-20)

• added the XL.Book.ErrorCode for getting error codes
• added possibility to read conditional formats with the XL.Book.ConditionalFormat
• added possibility to remove conditional formattings with the XL.Sheet.RemoveConditionalFormatting
• added possibility to clear all data from a workbook with the XL.Book.Clear
• fixed a bug with decrypting password-protected workbooks for the 32-bit version of the library
• fixed an issue that caused a crash when using an empty password

• XL.Book.ErrorCode
• XL.Book.ConditionalFormat
• XL.Sheet.ConditionalFormatSize
• XL.Book.Clear
• XL.Sheet.ConditionalFormatting
• XL.Sheet.RemoveConditionalFormatting
• XL.Sheet.ConditionalFormatSize

LibXL is a powerful library to create, read, edit and write Excel documents in older and newer Excel file formats and without the need to install Microsoft Excel. It allows the developer to automate a lot of tasks related to Excel spreadsheets within your solution or application.

Learn more on our LibXL for FileMaker pages.