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Ossfuzz

Checked
trailofbits·vlatest·testing·CC-BY-SA-4.0

Ossfuzz generates adversarial examples to test software robustness and uncover hidden vulnerabilities by subtly perturbing inputs.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add trailofbits/skills --skill ossfuzz -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

trailofbits

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned trailofbits/skills at 82fe822625.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
82fe822625
Manifest
plugins/testing-handbook-skills/skills/ossfuzz/SKILL.md
Scanned
2 files, 399 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

OSS-Fuzz is a Google-run fuzzing service that provides automated, continuous software fuzzer infrastructure. It helps developers find security vulnerabilities and bugs in their code by automatically generating test inputs to expose unexpected behavior. OSS-Fuzz handles the complexities of setting up and maintaining a fuzzing environment, allowing teams to focus on fixing discovered issues.

When to use it

  • When you need automated vulnerability discovery for open source projects.
  • To improve the security posture of your software by proactively identifying bugs.
  • For continuous integration pipelines where regular testing is crucial.
  • When dealing with complex codebases that are difficult to test manually.

Key capabilities

  • Automated fuzzing infrastructure
  • Continuous software fuzzer
  • Vulnerability discovery
  • Bug finding

Example prompts

  • "Can you tell me how OSS-Fuzz works?"
  • "What projects currently use the OSS-Fuzz service?"
  • "Explain the benefits of using automated fuzzing for security."

Tips & gotchas

OSS-Fuzz requires a significant amount of setup and integration with your build system. It's most effective when used as part of an ongoing development process, rather than a one-time audit.