security-global-input-validation

A set of security rules for checking data received from users, forms, APIs, or other outside sources. It recommends checking type, format, size, range, and content before using or displaying the data.

In plain words
What is it for?
Designing client- and server-side validation, checking API and form data, sanitizing stored or displayed values, and reviewing input-handling code.
Why use it?
It reduces the risk that malformed or hostile input reaches storage, application logic, or other systems.

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-input-validation
Clone the repo
git clone --depth 1 https://github.com/AdobeDocs/ff-services-docs

Made for: Cursor.

Per session 17 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 277 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00017 $0.00277
Opus 5 $0.00009 $0.00138
Sonnet 5 $0.00003 $0.00055
Haiku 4.5 $0.00002 $0.00028

Measured 2d ago against content hash b5eb90ff796e, 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-input-validation 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-input-validation.mdc · 42 lines

What it actually says

Input Validation

Proper input validation is the first line of defense against malformed or unexpected data, reducing the attack surface before deeper security controls handle injection or context-specific risks.

Key Principles

  • Validate on both sides: Implement validation on both client and server
  • Whitelist over blacklist: Prefer allowlist approaches over trying to block known bad inputs
  • Defense in depth: Apply multiple validation layers
  • Validate before use: Validate input as close as possible to where it's used

Input Validation Techniques

Type Checking

  • Enforce strong typing
  • Validate data types before processing
  • Use schema validation where appropriate

Format Validation

  • Validate using patterns/regex for format-specific inputs
  • Implement strict validation for sensitive fields (email, phone, etc.)
  • Validate ranges, lengths, and sizes

Sanitization

  • Sanitize data before storage or display
  • Remove/escape potentially dangerous characters
  • Use context-appropriate encoding when outputting

Anti-Patterns to Avoid

  • Using client-side validation only
  • Relying only on blacklists
  • Validating only on form submission
  • Skipping validation for "trusted" sources
  • Implementing custom validation for standard formats
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 · 42 lines · 17 tokens per session scan A b5eb90ff796e

Subscribe to this mod's changes

security-global-input-validation 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 17 tokens to every session and 277 once invoked, about $0.0001 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.