k8s-istio-bypass

k8s-istio-bypass is a skill for Claude Code, Codex from wgpsec/AboutSecurity. It costs 102 tokens per session (1,220 once invoked), scanned A, original, no licence file.

A guide to assessing Istio security controls in Kubernetes. Istio is a service mesh that manages traffic between services, while Envoy is the proxy often placed beside each application container.

In plain words
What is it for?
Use it when a cluster has Istio or Envoy sidecars, especially when requests return 403 authorization errors or service-to-service access is restricted.
Why use it?
It helps investigate requests blocked by Istio authorization rules or other service-mesh restrictions.

Skill for Claude CodeCodex

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

Good fit Use it when a cluster has Istio or Envoy sidecars, especially when requests return 403 authorization errors or service-to-service access is restricted.

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

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/wgpsec/aboutsecurity/k8s-istio-bypass"><img src="https://agentmods.dev/badge/skills/wgpsec/aboutsecurity/k8s-istio-bypass.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,220 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: 2 findings, 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 Privilege Escalation · line 26
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 37
    Potential security issue detected. Manual review is recommended.
    Fix: Review the flagged content for security risks. Ensure no credentials, secrets, or sensitive data are exposed.
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 $0.00102 $0.01220
Opus 5 $0.00051 $0.00610
Sonnet 5 $0.00020 $0.00244
Haiku 4.5 $0.00010 $0.00122

Measured 10d ago against content hash 20721ca69870, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

k8s-istio-bypass 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 <target-service>.<namespace>.svc.cluster.local
skills/cloud/k8s-istio-bypass/SKILL.md · 129 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

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 · 129 lines · 102 tokens per session scan A 20721ca69870

Subscribe to this mod's changes

k8s-istio-bypass is a skill published in the GitHub repository wgpsec/AboutSecurity (1,730 stars, last pushed 10d ago), with no licence file. It adds 102 tokens to every session and 1,220 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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