google/clusterfuzz

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Scalable fuzzing infrastructure.

Stars: 5.6k
Forks: 629
Open beginner issues: 0
Indexed issues: 53
Avg merge: 4d 6h
Merged PRs (30d): 22

Dominant language: Python
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Open All

53 open issues indexed

Improve http_server_test to load server than calling do_GET directly. Open

testonly

google/clusterfuzz#299 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Don't download plugins on every invocation of launcher.py Open

bug

google/clusterfuzz#320 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
1 Byte testcases rarely written to log bucket when using fork mode Open

bug

google/clusterfuzz#328 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Integration of new test case reducers? Open

core feature

google/clusterfuzz#338 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Minimize *SAN_OPTIONS for blackbox fuzzers Open

core feature

google/clusterfuzz#353 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Consider adding linting as a git hook before pushing Open

enhancement

google/clusterfuzz#402 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Document DFT-based fuzzing Open

documentation

google/clusterfuzz#558 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
ClusterFuzz reproduce tool meta bug Open

core feature

google/clusterfuzz#572 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Down-weight fuzz targets that have issue(s) with `Fuzz-Blocker` label Open

google/clusterfuzz#612 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Symbolize NEW_FUNC lines in libFuzzer Open

bug minor enhancement

google/clusterfuzz#770 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
new_edge and new_features stat may be incorrect (e.g. -max_len is used or -use_value_profile) Open

bug

google/clusterfuzz#802 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Feature request: allocate more time when minimizing long inputs Open

bug

google/clusterfuzz#913 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Add Better Support for AFL/gcc Open

google/clusterfuzz#920 · 3 comments · 1 reaction · 1 assignee · Indexed Sep 16, 2026
Better documentation for local deploy Open

documentation

google/clusterfuzz#1012 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Make AFL use its own minimization (fixes broken AFL minimization regression after new engine impl) Open

core feature

google/clusterfuzz#1086 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Migrate AFL to new fuzzing engine interface. Open

core feature

google/clusterfuzz#1127 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Re-enable python coverage for unit tests. Open

core feature

google/clusterfuzz#1227 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Tracking bug: improving DFT-based fuzzing strategy Open

core feature

google/clusterfuzz#1346 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Better support for Rust fuzzing Open

core feature

google/clusterfuzz#1407 · 14 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Verifying that custom mutator is loaded successfully by libFuzzer Open

google/clusterfuzz#1478 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Running Python 2 blackbox fuzzers from Python 3. Open

Py2->3

google/clusterfuzz#1584 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
in local development, zip uploads are broken Open

google/clusterfuzz#1715 · 12 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Remove python2 deployment in deploy.py,package.py,update_task.py Open

google/clusterfuzz#1850 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Question: Integrating 3rd party fuzzers Open

google/clusterfuzz#1930 · 5 comments · 3 reactions · 1 assignee · Indexed Sep 16, 2026
Re-enable useful alerts Open

google/clusterfuzz#1945 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
ClusterFuzz shouldn't exception on new OSS-Fuzz projects that fail to build for the first time. Open

backlog minor enhancement stale

google/clusterfuzz#1995 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
reproduce.sh fails. Open

google/clusterfuzz#2025 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
uploading coverage info Open

google/clusterfuzz#2051 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Impact label assignment Open

google/clusterfuzz#2106 · 2 comments · 0 reactions · 2 assignees · Indexed Sep 16, 2026
Common strategy code (e.g. corpus subset, radamsa) should be moved to fuzz task Open

google/clusterfuzz#2112 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
afl++ settings Open

google/clusterfuzz#2234 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
AFL/AFL++ issues: please post here Open

google/clusterfuzz#2306 · 27 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
reproduce tool setup failed due to scipy compilation failure Open

google/clusterfuzz#2391 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Reason for default bot config to use old docker image Open

google/clusterfuzz#2519 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
external reproduction: retry before closing Open

google/clusterfuzz#2540 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Tolerate some errors as part of external updates Open

google/clusterfuzz#2601 · 0 comments · 1 reaction · 1 assignee · Indexed Sep 16, 2026
IAM Policy bindings are limited to 1500 Open

bug priority

google/clusterfuzz#2775 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Don't file issues for crashes in custom mutators Open

google/clusterfuzz#2827 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Migrate app engine cron to GKE cron. Open

enhancement

google/clusterfuzz#2878 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Centipede not always setting sanitized_target Open

google/clusterfuzz#3029 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Implement sandboxing for Android Cuttlefish VM's Open

minor enhancement

google/clusterfuzz#3777 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Alternative supported deployment methods (like a terraform module) Open

google/clusterfuzz#3788 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Fix issue where global variables are causing tests to pass when they should fail Open

backlog

google/clusterfuzz#4016 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Fix centipede exceptions Open

google/clusterfuzz#4187 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
`JobRun` not being saved with the fully qualified fuzz_target name. Open

bug

google/clusterfuzz#4217 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Make firebase auth work with appengine staging Open

backlog bug

google/clusterfuzz#4269 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Delete the monorail issue tracker code Open

google/clusterfuzz#4282 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Incompatible return types for storage.get between local filesystem and GCS implementation Open

google/clusterfuzz#4357 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
[Tech debt] Split success and error return values in uworker_output.ErrorType Open

google/clusterfuzz#4517 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Reject symbolic and hard links in untrusted TAR archives Open

stale

google/clusterfuzz#5364 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026

google/clusterfuzz

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