---
id: 4316
title: "In WAF we (should not) trust"
source_domain: blog.quarkslab.com
source_url: "https://blog.quarkslab.com/in-waf-we-should-not-trust.html"
published_at: "2026-03-25 23:00"
tags: ["appsec", "web-security", "command-obfuscation", "waf", "http", "pentest", "payload-obfuscation", "waf-bypass"]
phying_url: "https://phying.com/item/4316"
lang: en
---

# In WAF we (should not) trust

## Summary

Quarkslab deep-dives WAF bypasses: how blacklists, penalty boxes, rate limiting and parsing discrepancies between a WAF and its backend can be abused to sneak malicious payloads through.

## Intelligence Metadata

- **Sources:** blog.quarkslab.com
- **Published:** 2026-03-25 23:00
- **Original:** https://blog.quarkslab.com/in-waf-we-should-not-trust.html
- **Phying News:** https://phying.com/item/4316