review-security-k8s-nodes SKILL.md skillA
review-security-k8s-nodes from gke-labs/kube-agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gke-labs/kube-agents/review-security-k8s-nodes@git:20260521.2bcbdefPins git:20260521.2bcbdef in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gke-labs/kube-agents
- Path
.agents/skills/review-security-k8s-nodes/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260521.2bcbdef, committed May 21, 2026
- First version recorded
- May 20, 2026
- Size
- 1,294 bytes
- Repository stars
- 124
- License
- Apache-2.0
Reviews Kubernetes manifests for node boundary violations and risks of node-to-cluster privilege escalation.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Task Review K8s manifests for node boundary violations allowing compromised nodes/pods to escalate privileges cluster-wide. # Checks ## 1. Credential & HostPath Abuse - **Kubelet Credential Theft**: Flag `hostPath` mounts to sensitive node directories (`/etc/kubernetes`, `/var/lib/kubelet`, `kubeconfig`). Recommend VAPs. - **Runtime Socket Mounts**: Flag `hostPath` mounts to container runtime sockets (e.g., `/var/run/docker.sock`, `containerd.sock`). Enables full node takeover. ## 2. RBAC & NodeRestriction Bypass - **Overprivileged Node Groups**: Flag extra RBAC bindings for `system:nodes` or `system:node:<name>` bypassing `NodeRestriction`. - **Node Impersonation**: Flag roles granting `impersonate` on `system:nodes`. - **Node Modification**: Flag KSA roles granting node modification (`create`, `update`, `patch`, `delete` on `nodes`, `nodes/status`, etc.). Allows malicious relabeling/scheduling. ## 3. Lateral Pivot via Scheduling - **Malicious Scheduling**: Flag broad `tolerations` (e.g., `operator: Exists` with no key) on untrusted workloads allowing them to schedule on sensitive nodes (e.g. control-plane).
Read the whole file at its exact version.
How to install
mdr add gke-labs/kube-agents/review-security-k8s-nodes@sha256:7363e81f095eca71The line at the top of this page pins the label git:20260521.2bcbdef, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_wis3fncunztomcs2)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 20, 2026 and May 21, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260521.2bcbdef latest | 2026-05-21 | 2bcbdef | 1,294 B | A | view · diff |
| git:20260521.27b4bc9 | 2026-05-21 | 27b4bc9 | 1,286 B | A | view · diff |
| git:20260521.94c412d | 2026-05-21 | 94c412d | 3,053 B | A | view · diff |
| git:20260521.2ef9055 | 2026-05-21 | 2ef9055 | 3,445 B | A | view · diff |
| git:20260520.4daa43e | 2026-05-20 | 4daa43e | 988 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1294 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
gke-labs/kube-agents · 124 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wis3fncunztomcs2 GET https://markdownregistry.com/api/v1/resolve?ref=gke-labs/kube-agents/review-security-k8s-nodes GET https://markdownregistry.com/api/v1/blob/7363e81f095eca7103f13a257a479e8222ece2f5d186b933f6f576022e59c14e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.