http-host-header-attacks

http-host-header-attacks is a skill for Claude Code, Codex from jinyimeng01/net-code-audit-skill-master. It costs 0 tokens per session (2,961 once invoked), scanned B, original, MulanPSL-2.0.

Reference material for authorized security audits of HTTP Host header attacks in .NET applications. It is an archived source used to support audit findings, not a general-purpose coding add-on.

In plain words
What is it for?
Use it when preparing an authorized .NET security audit involving HTTP Host header handling.
Why use it?
It can provide background for analyzing a specific web-security weakness. The listing does not describe an executable tool or workflow beyond that reference purpose.

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 when preparing an authorized .NET security audit involving HTTP Host header handling.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jinyimeng01/net-code-audit-skill-master/http-host-header-attacks
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 jinyimeng01/net-code-audit-skill-master --skill http-host-header-attacks
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 http-host-header-attacks

README.md
[![agentmods](https://agentmods.dev/badge/skills/jinyimeng01/net-code-audit-skill-master/http-host-header-attacks/github.svg)](https://agentmods.dev/skills/jinyimeng01/net-code-audit-skill-master/http-host-header-attacks)
Your own site
<a href="https://agentmods.dev/skills/jinyimeng01/net-code-audit-skill-master/http-host-header-attacks"><img src="https://agentmods.dev/badge/skills/jinyimeng01/net-code-audit-skill-master/http-host-header-attacks/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for http-host-header-attacks

Your own site · 80×15
<a href="https://agentmods.dev/skills/jinyimeng01/net-code-audit-skill-master/http-host-header-attacks"><img src="https://agentmods.dev/badge/skills/jinyimeng01/net-code-audit-skill-master/http-host-header-attacks.svg" alt="Reviewed on agentmods" width="80" 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 2,961 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00000 $0.02961
Opus 5.5 $0.00000 $0.01184
Sonnet 5.5 $0.00000 $0.00592
Haiku 4.5 $0.00000 $0.00296

Measured 1mo ago against content hash 0b1d86654f92, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

http-host-header-attacks scanned grade B 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 1mo 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.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

│ └── Host: 169.254.169.254 → cloud metadata?

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/http-host-header-attacks/SKILL.md · 330 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

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. 1mo ago First seen · 330 lines · 0 tokens per session scan B 0b1d86654f92

Subscribe to this mod's changes

http-host-header-attacks is a skill published in the GitHub repository jinyimeng01/net-code-audit-skill-master (7 stars, last pushed 5mo ago), licensed MulanPSL-2.0. It costs nothing until one of its globs matches a file; then it loads 2,961 tokens. A static security scan graded it B with 1 finding (cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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