container-k8s-escape SKILL.md skillA
container-k8s-escape from hypnguyen1209/offensive-claude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hypnguyen1209/offensive-claude/container-k8s-escape@git:20260629.9f4a1a5Pins git:20260629.9f4a1a5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hypnguyen1209/offensive-claude
- Path
skills/container-k8s-escape/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260629.9f4a1a5, committed Jun 29, 2026
- First version recorded
- Jun 28, 2026
- Size
- 10,130 bytes
- Repository stars
- 405
- License
- MIT
Use when breaking out of a container or escalating inside Kubernetes — runc/BuildKit CVEs, privileged/capability/cgroup misconfig escapes, NVIDIA GPU toolkit escape, K8s RBAC abuse, kubelet RCE, ingress/admission-controller RCE, node-to-cluster pivot.
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
# Container Breakout & Kubernetes Escape ## When to Activate - You have code execution inside a container/pod and want to break out to the host node - Auditing a Kubernetes cluster for RBAC privilege-escalation and lateral-movement paths - Assessing runc/containerd/BuildKit/Docker runtime versions against known escape CVEs - A pod is privileged, has dangerous capabilities, hostPath/hostPID/hostNetwork, or a mounted docker.sock - Attacking GPU/AI workloads using the NVIDIA Container Toolkit - Testing ingress-nginx / admission-controller exposure for unauthenticated RCE - Post-escape: pivoting from one node to full cluster takeover (kubelet, SA tokens, etcd, cloud IMDS) - Building Falco/Sigma detections for container-escape behavior (defensive validation) ## Technique Map | Technique | ATT&CK | CWE | Reference | Script | |-----------|--------|-----|-----------|--------| | runc working-dir fd leak escape (Leaky Vessels, CVE-2024-21626) | T1611 | CWE-403 | references/runtime-cve-escapes.md | scripts/runc_cwd_escape.py | | runc masked-path / `/dev/null` symlink escape (CVE-2025-31133) | T1611 | CWE-367 | references/runtime-cve-escapes.md | scripts/runc_cwd_escape.py | …
Read the whole file at its exact version.
How to install
mdr add hypnguyen1209/offensive-claude/container-k8s-escape@sha256:d208cf5352f32acdThe line at the top of this page pins the label git:20260629.9f4a1a5, 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_62rjx4bsp5buwui6)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 28, 2026 and Jun 29, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260629.9f4a1a5 latest | 2026-06-29 | 9f4a1a5 | 10,130 B | A | view · diff |
| git:20260628.d1cc1ce | 2026-06-28 | d1cc1ce | 10,163 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 (10130 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
hypnguyen1209/offensive-claude · 405 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_62rjx4bsp5buwui6 GET https://markdownregistry.com/api/v1/resolve?ref=hypnguyen1209/offensive-claude/container-k8s-escape GET https://markdownregistry.com/api/v1/blob/d208cf5352f32acd3c8d0f560d592876f82e7ff2b5e885139f633f20486c33ce
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.