Integrate Atheris with Vulnetix. Fuzz Python libraries with coverage-guided mutations, then convert crash findings to JSON for upload.
Install & scan
$ # Recommended: ephemeral environment
uv run --with atheris python3 -c "import atheris; print('Atheris ready')"
# Or install globally
pip install atheris
$ # Run the fuzz target script
python3 fuzz_target.py -max_total_time=300
# Or via uv
uv run --with atheris python3 fuzz_target.py -max_total_time=300
Run Atheris in CI
Scan on every push and upload the report as a workflow artifact:
- name: Install Atheris
run: pip install atheris
- name: Run Atheris fuzz target (5 minutes)
run: |
timeout 300 python3 fuzz_target.py -max_total_time=300 corpus/ || true
ls crash-* 2>/dev/null && echo "Crashes found!" || echo "No crashes in this run"
How Vulnetix compares: better together
Vulnetix does not replace Atheris. Keep running it. Vulnetix sits on top of Atheris (and every other scanner you already own) turning disconnected tool outputs into one prioritised, fixable queue.
| Capability | Vulnetix | Atheris |
|---|---|---|
| Security coverage | ||
| SAST (static code analysis) | ✓ Built-in rules + Semgrep augmentation | ✗ |
| SCA / dependencies | ✓ 40+ ecosystems, transitive graph | ✗ |
| DAST (dynamic testing) | ~ Ingests DAST results; no native dynamic engine | ✗ |
| Container & image | ✓ Image CVEs, base image, Dockerfile | ✗ |
| IaC / misconfiguration | ✓ Terraform, k8s, CloudFormation | ✗ |
| Secret scanning | ✓ 1,000+ rules, source + binary + git history | ✗ |
| Cloud / CSPM | ✓ Cloud-posture findings, compliance tab | ✗ |
| Mobile (MAST) | ~ Ingests mobile scanner output; no native mobile engine | ✗ |
| License compliance | ✓ SPDX, copyleft/AGPL/SSPL policy | ✗ |
| SBOM generation | ✓ CycloneDX 1.7 + SPDX 2.3, cosign-signable | ✗ |
| Malware / supply-chain | ✓ De-duplicated corpus + install-time firewall (25+ registries) | ✗ |
| Network / infra vuln | ~ Ingests network scanner output; no native network scanner | ✗ |
| Fuzzing | ✗ Ingests fuzzing crashes; no native fuzzer | ✓ Core: coverage-guided Python fuzzer on libFuzzer with native-extension sanitizer support |
| Pentest / bug bounty | ✗ Ingests pentest/bug-bounty findings; not a testing service | ✗ |
| The Vulnetix orchestration layer | ||
| Cross-scanner dedup & one queue (ASPM) | ✓ Correlates every scanner into one prioritised queue with ownership routing | ✗ |
| Exploit-intel prioritisation | ✓ EPSS, CISA KEV, Coalition ESS, CWSS, Vulnetix LEV | ✗ |
| Reachability analysis | ✓ Tree-sitter + CVEAffected; direct/transitive/semantic | ✗ |
| Versioned VEX + audit trail | ✓ Immutable OpenVEX/CycloneDX, cosign-signable | ✗ |
| Safe Harbour autofix | ✓ Resolves + applies the nearest safe version | ✗ |
| End-of-life policy | ✓ Flags/blocks past-EOL runtimes & packages | ✗ |
| SSVC / risk-based policy | ✓ SSVC v2 + CISA/FedRAMP/Essential-8 presets | ✗ |
✓ full · ~ partial · ✗ not covered
What Atheris does well
- Coverage-guided Python fuzzing engine built on libFuzzer, using CPython bytecode instrumentation for Python-level branch coverage
- Fuzzes native C/C++ CPython extensions in the same process with Address Sanitizer / Undefined Behavior Sanitizer
- Structure-aware fuzzing via custom mutators/crossover and libprotobuf-mutator for grammar- and protobuf-aware inputs
- FuzzedDataProvider utility to derive typed data from raw bytes, plus first-class OSS-Fuzz integration
Where Vulnetix adds to it: Vulnetix has no fuzzing engine and does not run Python fuzzing itself; it ingests Atheris crash findings (uncaught exceptions, ASan/UBSan native crashes) and folds them into its unified prioritised queue with EPSS/KEV exploit-intel, VEX and autofix. Atheris finds the Python bugs; Vulnetix triages them next to its SCA/SAST/SBOM coverage.
No migration, no rip-and-replace. Atheris keeps doing what it does best; Vulnetix adds the orchestration, exploit-intelligence prioritisation and remediation layer built for the way AppSec works today.
Centralise Atheris results in Vulnetix
Upload Atheris JSON output to the Vulnetix platform to deduplicate findings, prioritise them with EPSS, CISA KEV and Coalition ESS exploit intelligence, and track remediation across every scanner in a single queue.