k8s-ingress-nightmare

k8s-ingress-nightmare is a skill for Claude Code, Codex from wgpsec/AboutSecurity. It costs 90 tokens per session (1,299 once invoked), scanned A, original, no licence file.

A playbook for testing IngressNightmare, a Kubernetes Ingress-NGINX admission-controller vulnerability that can allow unauthorised remote code execution under specific conditions.

In plain words
What is it for?
It helps security testers assess the vulnerability, use its proof of concept, and examine possible follow-on movement within the cluster.
Why use it?
It helps determine whether an exposed admission webhook is reachable and whether the cluster meets the conditions needed for exploitation.

Skill for Claude CodeCodex

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

Good fit It helps security testers assess the vulnerability, use its proof of concept, and examine possible follow-on movement within the cluster.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wgpsec/aboutsecurity/k8s-ingress-nightmare
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 k8s-ingress-nightmare
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 k8s-ingress-nightmare

README.md
[![agentmods](https://agentmods.dev/badge/skills/wgpsec/aboutsecurity/k8s-ingress-nightmare/github.svg)](https://agentmods.dev/skills/wgpsec/aboutsecurity/k8s-ingress-nightmare)
Your own site
<a href="https://agentmods.dev/skills/wgpsec/aboutsecurity/k8s-ingress-nightmare"><img src="https://agentmods.dev/badge/skills/wgpsec/aboutsecurity/k8s-ingress-nightmare/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 k8s-ingress-nightmare

Your own site · 80×15
<a href="https://agentmods.dev/skills/wgpsec/aboutsecurity/k8s-ingress-nightmare"><img src="https://agentmods.dev/badge/skills/wgpsec/aboutsecurity/k8s-ingress-nightmare.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,299 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 high

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 →

  • high YARA Match · line 32
    YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).
    Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
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 $0.00090 $0.01299
Opus 5 $0.00045 $0.00649
Sonnet 5 $0.00018 $0.00260
Haiku 4.5 $0.00009 $0.00130

Measured 10d ago against content hash 12b3c8e7d88d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

k8s-ingress-nightmare 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 10d 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.

curl -sk https://TARGET_IP/ -I # 看 Server 头是否包含 nginx
skills/cloud/k8s-ingress-nightmare/SKILL.md · 115 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. 10d ago First seen · 115 lines · 90 tokens per session scan A 12b3c8e7d88d

Subscribe to this mod's changes

k8s-ingress-nightmare is a skill published in the GitHub repository wgpsec/AboutSecurity (1,730 stars, last pushed 10d ago), with no licence file. It adds 90 tokens to every session and 1,299 once invoked, about $0.0005 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 2026-08-30.

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