# 0xacb/recollapse

REcollapse is a helper tool for black-box regex fuzzing to bypass validations and discover normalizations in web applications

Repository: https://github.com/0xacb/recollapse
Canonical: https://ross.abutalabs.com/products/recollapse
Language: Python
License: MIT
License Family: permissive
Topics: fuzzing, normalization, regex, waf-bypass, hacking-tools
Last push: 2025-08-07T19:23:50+00:00

## Health v2 (maintenance only)
Score: 46/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 35, release rhythm 30, longevity 99
- inputs: {"age_days": 1390, "days_push": 391, "days_rel": 391, "gap_med": 57.5, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1371, forks 150 (observed 2026-08-28T04:04:32.033631+00:00)

## What it is
REcollapse is a Python CLI helper tool that generates fuzzing payloads for black-box regex fuzzing against web applications. It helps bypass input validations, discover normalization behaviors, and circumvent WAFs and weak mitigations.

## Use cases
- bypass waf filters in web apps
- discover input normalization in web applications
- generate fuzzing payloads for burp intruder
- bypass regex validation filters
- test weak vulnerability mitigations
- fuzz unicode normalization bypasses

## When to choose
- you need to generate validation-bypass payloads for manual or automated web testing
- you want to probe how a web app normalizes or truncates input
- you're doing black-box security testing of WAF-protected applications

## When to avoid
- you need a full fuzzer rather than a payload generator - pair it with ffuf or Burp
- you're not doing security testing of web applications
- you need automated scanning rather than targeted payload generation

## Facets
- artifact type: cli-tool
- maturity: active
- function: fuzzing, security, penetration-testing, cli
- domain: security, penetration-testing, web-development
- platform: python, cli, windows
- tags: waf-bypass, regex-fuzzing, payload-generation, hacking-tools, input-validation, linux, macos, docker

## Member repositories
- 0xacb/recollapse (main) score 46

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:32.033631+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:40:48.280370+00:00, confidence not recorded.
  - readme: https://github.com/0xacb/recollapse (fetched 2026-08-28T04:04:32.033631+00:00, sha 342351988b19)
  - registry_pypi: https://pypi.org/pypi/recollapse/json (fetched 2026-08-29T11:57:24.653411+00:00, sha 767bb2c0992b)
- Data as of 2026-08-30T08:39:29.467469+00:00.