Project: urllib3

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 2
Lines of code 3738
Lines covered 1728
Code coverage 46.23%
Code coverage report Report link
Static reachability 0.18%
Fuzz Introspector report Report link (from 2026-02-14)

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
connection.HTTPSConnection.connect connection 237 0.0%
connection.HTTPSConnection._connect_tls_proxy connection 220 0.0%
connection._ssl_wrap_socket_and_match_hostname connection 217 0.0%
contrib.emscripten.connection.EmscriptenHTTPConnection.request contrib.emscripten.connection 211 0.0%
poolmanager.PoolManager.connection_from_url poolmanager 180 0.0%
_request_methods.RequestMethods.request_encode_url _request_methods 167 0.0%
poolmanager.ProxyManager.urlopen poolmanager 154 0.0%
connectionpool.HTTPConnectionPool.is_same_host connectionpool 154 0.0%
poolmanager.proxy_from_url poolmanager 153 0.0%
poolmanager.ProxyManager.__init__ poolmanager 150 0.0%