install

Additional install commands

macOS

Homebrewverified · 100%

brew install forbidden

local Homebrew formula metadata

Linux

Nixverified · 92%

nix profile install nixpkgs#forbidden

nixpkgs package indexes · pkgs/by-name/fo/forbidden/package.nix · source: api.github.com

overview

Package summary

Bypass 4xx HTTP response status codes and more

Project links

Commands and aliases

forbidden
stresser

history

Project history and usage

Forbidden is a security testing CLI for attempting bypasses of 4xx HTTP response status codes and related web access-control behaviors. Its README describes separate forbidden and stresser commands and states that the tool is based on Python Requests, PycURL, and Python's HTTP client.

Project history

The public project history available from official sources is mostly README-level rather than narrative. The maintained README documents a mature command set, a v13.4 build artifact in source-install instructions, and a roadmap of future tests such as hop-by-hop headers, User-Agent headers, cookies, HTTP smuggling, CRLF, Log4j, and AWS metadata SSRF.

Adoption history

The README positions pip as the standard installation route and mentions a Homebrew formula as an alternative that is not maintained by the author. That combination places Forbidden in the common pentesting-tool distribution pattern of upstream Python packaging plus downstream CLI formulas.

How it is used

Typical use is to supply a target URL and choose test groups such as protocols, methods, uploads, overrides, headers, path mutations, encodings, authentication bypasses, redirects, and parser tests. The README cautions about proxies normalizing URLs, rate limiting, anti-bot protections, and engine-specific behavior.

Why package nerds care

Forbidden is package-nerd relevant as a compact example of a Python security CLI that depends on multiple HTTP engines to exercise edge cases that ordinary curl invocations cannot always produce, such as duplicate Host headers or requests without a Host header.

Timeline

v13.4: README source-install instructions reference building forbidden-13.4-py3-none-any.whl.
Current README: Homebrew installation is documented as an alternative not maintained by the author.

Related projects

The README names Python Requests, PycURL, and Python HTTP Client as implementation engines and links to internal forbidden.py, test.py, and value.py files for the test definitions.

Sources

security posture

No protected-tool coverage found yet

No matching local secret-handling manifest was found for forbidden. Nucleus package metadata is still published here so future coverage has a stable package URL.

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 6 platform targets.
Installs with 7 runtime dependencies.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`forbidden`	cli	global executable
`stresser`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version13.4

manager updated2026-06-03

local dataok

upstreamnot checked

latest detectednot detected

https://github.com/ivan-sincek/forbidden

infoNo cached GitHub release or tag data was available.https://github.com/ivan-sincek/forbiddennone confidence

install metadata

Package metadata

Package key	brew:forbidden
Version	13.4
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/forbidden
Homepage	https://github.com/ivan-sincek/forbidden
Repository	https://github.com/ivan-sincek/forbidden
Upstream docs	https://github.com/ivan-sincek/forbidden
License	MIT
Source archive	https://files.pythonhosted.org/packages/9b/aa/98fc3ee28aac41cae341a197858ff6af5d79e40dcd45c8a6e37b1fdbfd19/forbidden-13.4.tar.gz
Last updated	2026-06-03T10:43:07Z
Pulse	updated
Dependencies	certifi, cffi, cryptography, curl, openssl@3, pycparser, python@3.14
Bottle	available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	forbidden
Version Scheme	0
Revision	7
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	head stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

forbidden

nix profile install nixpkgs#forbidden

normalized package name match
Matched by: Forbidden

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/fo/forbidden/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/forbidden.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install forbidden with Homebrew, Nix