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 15184
Lines covered 10114
Code coverage 66.61%
Code coverage report Report link
Static reachability 19.75%
Fuzz Introspector report Report link (from 2025-07-23)

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.reader.excel.load_workbook openpyxl.reader.excel 912 0.0%
openpyxl.reader.excel.ExcelReader.read openpyxl.reader.excel 898 0.0%
openpyxl.reader.excel.ExcelReader.read_worksheets openpyxl.reader.excel 665 0.0%
openpyxl.worksheet._write_only.WriteOnlyWorksheet.close openpyxl.worksheet._write_only 489 0.0%
openpyxl.worksheet._reader.WorksheetReader.bind_all openpyxl.worksheet._reader 407 0.0%
openpyxl.reader.excel.ExcelReader.read_workbook openpyxl.reader.excel 375 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._reader.WorksheetReader.bind_cells openpyxl.worksheet._reader 279 0.0%