sast-rce

sast-rce is a skill for Claude Code, Codex from capture0x/YeepForge. It costs 110 tokens per session (8,379 once invoked), scanned B, original, no licence file.

A security review skill for finding remote code execution (RCE), a flaw that lets untrusted input run commands or code on a computer.

In plain words
What is it for?
Searching for dangerous execution points, checking input paths to them, and combining the findings.
Why use it?
It helps trace user-controlled data through risky operations such as shell commands and eval-like code.

Skill for Claude CodeCodex

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

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/capture0x/yeepforge/sast-rce
Any agent
npx skills add capture0x/YeepForge --skill sast-rce
Clone the repo
git clone --depth 1 https://github.com/capture0x/YeepForge

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 sast-rce

README.md
[![agentmods](https://agentmods.dev/badge/skills/capture0x/yeepforge/sast-rce.svg)](https://agentmods.dev/skills/capture0x/yeepforge/sast-rce)
Your own site
<a href="https://agentmods.dev/skills/capture0x/yeepforge/sast-rce"><img src="https://agentmods.dev/badge/skills/capture0x/yeepforge/sast-rce.svg" alt="Measured on agentmods" height="20"></a>
Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,379 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 3 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 5.1 $0.00110 $0.08379
Opus 5 $0.00055 $0.04189
Sonnet 5 $0.00022 $0.01676
Haiku 4.5 $0.00011 $0.00838

Measured 5d ago against content hash c112c7e28d36, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade B, and why

sast-rce scanned grade B with 3 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 5d 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.

Encoded or obfuscated payloadmediumSupply chain

base64 or hex that is decoded and executed hides what actually runs from anyone reading the file.

> - `marshal.loads(var)`, `marshal.load(file_var)` - flag always

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 command or payload to confirm the finding.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- **Safe subprocess list-form calls**: `subprocess.run(["ls", user_arg])` with a list and no `shell=True` - arguments are passed directly to the OS without shell expansion; not vulnerable to command injection
modules/sast_skills/sast-rce/SKILL.md · 714 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 5d ago First seen · 714 lines · 110 tokens per session scan B c112c7e28d36

Subscribe to this mod's changes

sast-rce is a skill published in the GitHub repository capture0x/YeepForge (1 stars, last pushed 12d ago), with no licence file. It adds 110 tokens to every session and 8,379 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it B with 3 findings (encoded or obfuscated payload, makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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