injection-prevention SKILL.md skillB
injection-prevention from hermeticormus/libresecops-claude-code is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hermeticormus/libresecops-claude-code/injection-prevention@git:20260930.71a2663Pins git:20260930.71a2663 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hermeticormus/libresecops-claude-code
- Path
plugins/secure-coding-practices/skills/injection-prevention/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260930.71a2663, committed Sep 30, 2026
- First version recorded
- Feb 25, 2026
- Size
- 10,557 bytes
- Repository stars
- 4
- License
- MIT
Injection prevention patterns for SQL, XSS, command injection, path traversal, LDAP, and template injection across major languages, including edge cases such as ORDER BY, IN clauses, and second-order injection. Use when writing or fixing code that builds queries, commands, paths, or HTML from input.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Injection Prevention
> Comprehensive injection prevention patterns for SQL, XSS, command injection, path traversal, LDAP, and template injection across all major languages and frameworks.
## Knowledge Base
### The Fundamental Principle
Injection occurs when untrusted data is interpreted as code or structure by a downstream processor. The universal prevention is to ensure the processor can distinguish data from code. This is achieved through:
1. **Parameterization** -- Sending data through a separate channel from code (prepared statements, argument arrays)
2. **Context-aware encoding** -- Transforming data so it is inert in the target context (HTML encoding, URL encoding)
3. **Allowlist validation** -- Accepting only data that matches a known-safe pattern (enum values, regex matching)
Denylist filtering (blocking known-bad characters) is almost always insufficient because there are too many encoding variations and bypass techniques.
### SQL Injection
**Root cause**: User input concatenated into SQL query strings.
**Prevention by language**:
```python
# VULNERABLE
cursor.execute(f"SELECT * FROM users WHERE name = '{name}'")
# SECURE - Parameterized query
…Read the whole file at its exact version.
How to install
mdr add hermeticormus/libresecops-claude-code/injection-prevention@sha256:48d0fd100e4548b7The line at the top of this page pins the label git:20260930.71a2663, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_o33zzwa3lcugwiwy)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Feb 25, 2026 and Sep 30, 2026, about one every 218 days. Its first recorded version is graded C and its latest B.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260930.71a2663 latest | 2026-09-30 | 71a2663 | 10,557 B | B | view · diff |
| git:20260225.4a0a620 | 2026-02-25 | 4a0a620 | 10,203 B | C | view |
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10557 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
hermeticormus/libresecops-claude-code · 4 stars · license MIT · pushed 2026-10-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_o33zzwa3lcugwiwy GET https://markdownregistry.com/api/v1/resolve?ref=hermeticormus/libresecops-claude-code/injection-prevention GET https://markdownregistry.com/api/v1/blob/48d0fd100e4548b729d80b2c17c4028f7ebff8ee5e977a97c23409799964406f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.