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hunt-race-condition

Analyzes and documents race-condition vulnerabilities via read-write patterns and TOCTOU gaps.

Updated Jun 5, 2026
Search Tags:#concurrency#security-testing#TOCTOU#bug-bounty#race-condition#http2#single-packet
One-click install
npx skills add https://github.com/sseshachala/Claude-BugHunter-archive --skill hunt-race-condition-sseshachala
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: hunt-race-condition
Source: https://github.com/sseshachala/Claude-BugHunter-archive/tree/main/skills/hunt-race-condition
Command: npx skills add https://github.com/sseshachala/Claude-BugHunter-archive --skill hunt-race-condition-sseshachala

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps security researchers and engineers identify and reproduce race-condition vulnerabilities in software systems, enabling reliable testing and verification of TOCTOU gaps and concurrency flaws.

Core Features & Use Cases

  • Structured methodology: step-by-step guidance from surface mapping to verification.
  • Cross-class Coverage: applies to rate-limiting, account creation, payment flows, and token verification.
  • Reproducibility templates: practical playbooks and evidence collection to demonstrate exploitability.

Quick Start

Coordinate parallel requests against a target endpoint and verify concurrent state changes to reproduce a race condition.

Frequently Asked Questions about hunt-race-condition

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I identify and exploit race conditions in web applications?▼

Race conditions in authentication flows occur when concurrent requests bypass verification logic by exploiting TOCTOU gaps, allowing multiple operations to read and modify shared state simultaneously before updates lock.

What is a TOCTOU vulnerability and how does it impact concurrency controls?▼

Test single-packet race conditions by coordinating parallel HTTP2 requests against a target endpoint, monitoring for concurrent state changes that indicate exploited TOCTOU gaps and bypassed rate-limiting.

How do I safely reproduce concurrency flaws in payment and token verification flows?▼

Safely reproduce concurrency flaws by mapping target endpoints, applying structured methodology to coordinate concurrent requests against test endpoints, and collecting reproducibility templates as evidence of exploitability.

What database isolation levels and concurrency knowledge do I need for race condition testing?▼

Yes, this race condition testing methodology applies to rate-limiting bypasses, account creation, payment flows, and token verification by mapping read-modify-write patterns across concurrent requests.

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