security-global-base

General rules for writing secure code across user interfaces, APIs, databases, infrastructure, and automated code generation. They cover layered protection, limited permissions, safe failure, secure defaults, and reducing unnecessary complexity.

In plain words
What is it for?
Use it when designing, reviewing, manually writing, or generating code that needs secure access controls, configurations, error behavior, and system structure.
Why use it?
It gives a consistent security baseline and requires explanations when a rule is broken, making security problems easier to understand and fix.

Cursor rule for Cursor

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 rules/adobedocs/ff-services-docs/security-global-base
Clone the repo
git clone --depth 1 https://github.com/AdobeDocs/ff-services-docs

Made for: Cursor.

Per session 638 This file is loaded in full into every session.
When invoked 638 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00638 $0.00638
Opus 5 $0.00319 $0.00319
Sonnet 5 $0.00128 $0.00128
Haiku 4.5 $0.00064 $0.00064

Measured 2d ago against content hash caa12169275a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

security-global-base scanned grade A with 0 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.cursor/rules/security-global/security-global-base.mdc · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

These rules define essential practices for writing and generating secure code.
They apply universally — to manual development, automated tooling, and AI-generated code. Our codebase follows a security‑first mindset: security is built in from day one.

All violations must include a clear explanation of which rule was triggered and why, to help developers understand and fix the issue effectively.

Core Security Principles

1. Defense in Depth

  • Implement multiple layers of security controls
  • Apply security at every level (UI, API, database, infrastructure)
  • Never rely on a single security measure

2. Principle of Least Privilege

  • Grant minimal access required for functionality
  • Use role-based access control (RBAC)
  • Limit permissions to the smallest scope necessary

3. Fail Securely

  • Default to secure state when errors occur
  • Implement graceful degradation
  • Never expose sensitive information in error messages

4. Secure by Default

  • Ship secure configurations without extra setup
  • Enable security features automatically
  • Require explicit opt-out for insecure options

5. Keep It Simple

  • Reduce complexity to minimize attack surface
  • Avoid over-engineering security solutions
  • Use proven, well-tested security patterns

Critical Security Rules

1. Do Not Use Raw User Input in Sensitive Operations

  • Rule: Untrusted input must never be used directly in file access, command execution, database queries, or similar sensitive operations.

2. Do Not Expose Secrets in Public Code

  • Rule: Secrets such as API keys, credentials, private keys, or tokens must not appear in frontend code, public repositories, or client-distributed files.

3. Enforce Secure Communication Protocols

  • Rule: Only secure protocols (e.g., HTTPS, TLS) must be used for all external communications.

4. Avoid Executing Dynamic Code

  • Rule: Dynamically constructed code or expressions must not be executed at runtime.

5. Validate All External Input

  • Rule: Inputs from users, external APIs, or third-party systems must be validated before use.

Read the full file on GitHub · 77 lines

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 · 77 lines · 638 tokens per session scan A caa12169275a

Subscribe to this mod's changes

security-global-base is a cursor rule published in the GitHub repository AdobeDocs/ff-services-docs (4 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 638 tokens to every session, about $0.0032 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.