Individual skill
waf-bypass-techniques
WAF bypass methodology and generic evasion techniques. Use when a web application firewall blocks injection payloads (SQLi, XSS, RCE) and you need to craft bypasses using encoding, protocol-level tricks, or WAF-specific weaknesses.
knowledge/hack-skills/skills/waf-bypass-techniques/SKILL.md
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SKILL.mdcore · 10,828 bytesSKILL.mdcore · 10,828 bytesWAF_PRODUCT_MATRIX.mddoc · 9,911 bytes
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# SKILL: WAF Bypass Techniques — Evasion Playbook
> **AI LOAD INSTRUCTION**: Covers WAF identification, generic bypass categories (encoding, protocol abuse, HTTP/2, parameter pollution), and a decision tree. For product-specific bypasses (Cloudflare, AWS WAF, ModSecurity, Akamai, etc.), load [WAF_PRODUCT_MATRIX.md](./WAF_PRODUCT_MATRIX.md). Base models often suggest basic encoding but miss protocol-level bypasses and WAF behavioral quirks.
## 0. RELATED ROUTING
- [sqli-sql-injection](../sqli-sql-injection/SKILL.md) for payloads to deliver after bypassing WAF
- [xss-cross-site-scripting](../xss-cross-site-scripting/SKILL.md) for XSS payloads that need WAF evasion
- [request-smuggling](../request-smuggling/SKILL.md) when smuggling can route requests around WAF entirely
- [http-parameter-pollution](../http-parameter-pollution/SKILL.md) HPP is itself a WAF bypass primitive
- [csp-bypass-advanced](../csp-bypass-advanced/SKILL.md) when WAF blocks inline scripts but CSP bypass is available
- [ghost-bits-cast-attack](../ghost-bits-cast-attack/SKILL.md) **Java backends only** — when every encoding trick above is blocked, use Ghost Bits: Java's 16-bit `char` to 8-bit `byte` narrowing produces 255 Unicode bypass variants per dangerous ASCII byte; re-enables WAF-patched CVEs in Tomcat, Spring, Jetty, Jackson, Fastjson, BCEL, and more
### Product-Specific Reference