lobuhi/byp4xx

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1888 stars · 306 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

byp4xx is a command-line tool written in Go that attempts to bypass HTTP 40X (access denied) responses using techniques like verb tampering, custom headers, User-Agents, path variations, extensions, and default credentials. It wraps cURL options and applies wordlists from SecLists, including methods popularized by #bugbountytips.

Use cases

• bypass 403 forbidden responses on a URL
• test verb tampering to access restricted endpoints
• try default credentials on 401 protected resources
• probe endpoints with custom headers like X-Custom-IP-Authorization
• rate-limit-aware bypass testing during bug bounty hunting
• test multiple user agents and path extensions against a protected path

When to choose

• you need a quick automated way to test 40X bypass techniques during a pentest or bug bounty
• you want a single Go binary that reuses familiar cURL flags
• you need configurable rate limiting or threading for bypass attempts

When to avoid

• you need a full web vulnerability scanner rather than a focused 40X bypasser
• you require a maintained project with a license and active releases
• you need GUI-based testing or detailed reporting of findings

Facets

cli-tool · maturity maintenance

security http-client penetration-testing security penetration-testing web-development windows cli cross-platform http-40x-bypass bug-bounty curl-wrapper verb-tampering rate-limiting go command-line linux macos

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