http-smuggling-advanced

http-smuggling-advanced is a skill for Claude Code, Codex from wgpsec/AboutSecurity. It costs 87 tokens per session (1,690 once invoked), scanned A, original, no licence file.

A guide to advanced HTTP request smuggling, a security flaw where different servers interpret one web request as two. It covers confirmed CL.TE, TE.CL, TE.TE, and HTTP/2 downgrade cases, along with ways they can be chained into attacks.

In plain words
What is it for?
Use it for authorized security testing after confirming HTTP request smuggling, including chained attacks involving credentials, access rules, caches, or other users.
Why use it?
It helps security testers understand what an existing request-smuggling flaw could enable, such as bypassing access controls or poisoning a web cache.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it for authorized security testing after confirming HTTP request smuggling, including chained attacks involving credentials, access rules, caches, or other users.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wgpsec/aboutsecurity/http-smuggling-advanced
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.

Any agent
npx skills add wgpsec/AboutSecurity --skill http-smuggling-advanced
Clone the repo
git clone --depth 1 https://github.com/wgpsec/AboutSecurity

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 http-smuggling-advanced

README.md
[![agentmods](https://agentmods.dev/badge/skills/wgpsec/aboutsecurity/http-smuggling-advanced.svg)](https://agentmods.dev/skills/wgpsec/aboutsecurity/http-smuggling-advanced)
Your own site
<a href="https://agentmods.dev/skills/wgpsec/aboutsecurity/http-smuggling-advanced"><img src="https://agentmods.dev/badge/skills/wgpsec/aboutsecurity/http-smuggling-advanced.svg" alt="Measured on agentmods" height="20"></a>
Per session 87 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,690 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Data Exfiltration · line 181
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
How audits are shown
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 5.1 $0.00087 $0.01690
Opus 5 $0.00044 $0.00845
Sonnet 5 $0.00017 $0.00338
Haiku 4.5 $0.00009 $0.00169

Measured 4d ago against content hash 881683fa2736, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

http-smuggling-advanced 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 4d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

# 手动 curl 验证(CL.TE)
skills/exploit/advanced/http-smuggling-advanced/SKILL.md · 214 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 files 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. 4d ago First seen · 214 lines · 87 tokens per session scan A 881683fa2736

Subscribe to this mod's changes

http-smuggling-advanced is a skill published in the GitHub repository wgpsec/AboutSecurity (1,721 stars, last pushed 8d ago), with no licence file. It adds 87 tokens to every session and 1,690 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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