Project: openpyxl

Language python
OSS-Fuzz project link
Project repository link
Build status: Fuzzers succeeding: Build log
Build status: Code coverage succeeding: Build log
Build status: Fuzz Introspector succeeding: Build log
Fuzzer count 8
Lines of code 15258
Lines covered 12414
Code coverage 81.36%
Code coverage report Report link
Static reachability 18.80%
Fuzz Introspector report Report link (from 2025-11-16)

Historical Progression

Functions of interest to fuzz

This section outlines functions that may be of interest to fuzz. They are based on ranking functions that have a lot of complexity but currently exhibit low code coverage. The complexity is calculated based on the function itself as well as the functions called by the given function, i.e. the tree of code that the function triggers.


This is only a minor amount of introspection information available for this project. Please consult the Fuzz Introspector report for more information, e.g. the introspection table of all functions in the target project available here.

Function name Function source file Accumulated cyclomatic complexity Code coverage
openpyxl.worksheet._write_only.WriteOnlyWorksheet.close openpyxl.worksheet._write_only 492 0.0%
openpyxl.worksheet._write_only.WriteOnlyWorksheet.append openpyxl.worksheet._write_only 351 0.0%
openpyxl.worksheet._read_only.ReadOnlyWorksheet._get_cell openpyxl.worksheet._read_only 313 0.0%
openpyxl.worksheet._read_only.ReadOnlyWorksheet._cells_by_row openpyxl.worksheet._read_only 310 0.0%
openpyxl.worksheet._write_only.WriteOnlyWorksheet._get_writer openpyxl.worksheet._write_only 210 0.0%
openpyxl.workbook.workbook.Workbook.copy_worksheet openpyxl.workbook.workbook 205 0.0%
openpyxl.worksheet._write_only.WriteOnlyWorksheet._write_rows openpyxl.worksheet._write_only 164 0.0%
openpyxl.worksheet._writer.WorksheetWriter.write_tables openpyxl.worksheet._writer 159 15.78%
openpyxl.worksheet._write_only.WriteOnlyWorksheet.__init__ openpyxl.worksheet._write_only 130 0.0%
openpyxl.reader.strings.read_rich_text openpyxl.reader.strings 102 0.0%