request-smuggling

request-smuggling is a skill for Claude Code, Codex from jinyimeng01/net-code-audit-skill-master. It costs 0 tokens per session (3,238 once invoked), scanned A, original, MulanPSL-2.0.

A security-audit guide for HTTP request smuggling, a flaw caused by different systems interpreting the same request boundaries differently.

In plain words
What is it for?
Use it when examining applications deployed behind reverse proxies, gateways, or other HTTP intermediaries.
Why use it?
It helps find disagreements between proxies, caches, and application servers that can hide or misroute requests.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/jinyimeng01/net-code-audit-skill-master/request-smuggling
Any agent
npx skills add jinyimeng01/net-code-audit-skill-master --skill request-smuggling
Clone the repo
git clone --depth 1 https://github.com/jinyimeng01/net-code-audit-skill-master

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for request-smuggling

README.md
[![agentmods](https://agentmods.dev/badge/skills/jinyimeng01/net-code-audit-skill-master/request-smuggling.svg)](https://agentmods.dev/skills/jinyimeng01/net-code-audit-skill-master/request-smuggling)
Your own site
<a href="https://agentmods.dev/skills/jinyimeng01/net-code-audit-skill-master/request-smuggling"><img src="https://agentmods.dev/badge/skills/jinyimeng01/net-code-audit-skill-master/request-smuggling.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,238 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.03238
Opus 5 $0.00000 $0.01619
Sonnet 5 $0.00000 $0.00648
Haiku 4.5 $0.00000 $0.00324

Measured 5d ago against content hash 5f57f25a0c7d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

request-smuggling scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Sends data to an external URLlowData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

fetch("https://target.example/vulnerable", { method: "POST",

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

net-skill/dotnet-offsec-audit/references/raw/hack-skills/request-smuggling/SKILL.md · 321 lines

The source is not reproduced here

Licensed MulanPSL-2.0

The repository is licensed MulanPSL-2.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 321 lines · 0 tokens per session scan A 5f57f25a0c7d

Subscribe to this mod's changes

request-smuggling is a skill published in the GitHub repository jinyimeng01/net-code-audit-skill-master (5 stars, last pushed 4mo ago), licensed MulanPSL-2.0. It costs nothing until one of its globs matches a file; then it loads 3,238 tokens. A static security scan graded it A with 1 finding (sends data to an external url). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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