offensive-dependency-confusion SKILL.md skillA
offensive-dependency-confusion from snailsploit/claude-red is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add snailsploit/claude-red/offensive-dependency-confusion@git:20260825.900e4c2Pins git:20260825.900e4c2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- snailsploit/claude-red
- Path
Skills/supply-chain/offensive-dependency-confusion/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260825.900e4c2, committed Aug 25, 2026
- First version recorded
- Aug 25, 2026
- Size
- 23,800 bytes
- Repository stars
- 10,442
- License
- MIT
Deep-dive offensive methodology for dependency confusion and namespace attacks across all major package ecosystems. Covers npm scope confusion exploiting the gap between public and private scoped packages and .npmrc misconfigurations where registry mappings fail to pin internal scopes exclusively. Addresses PyPI namespace attacks through --extra-index-url resolution ordering, NuGet feed priority exploitation when multiple package sources are configured without clear directives, Maven and…
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
# Offensive Dependency Confusion and Namespace Attacks Dependency confusion exploits a fundamental design tension in package managers: the need to resolve packages from multiple sources. When an organization maintains internal packages alongside public dependencies, the resolution logic becomes an attack surface. You exploit the gap between how developers intend packages to resolve and how package managers actually resolve them. Alex Birsan's 2021 research demonstrated that this class of attack affected Apple, Microsoft, PayPal, Shopify, Netflix, Yelp, Tesla, and Uber, among others. The root cause -- preferring a higher-versioned public package over a lower-versioned private one -- remains exploitable wherever registry configuration is incomplete. This skill provides ecosystem-specific exploitation techniques, safe PoC methodology, and comprehensive reconnaissance approaches for discovering internal package names during authorized engagements. ## Quick Workflow 1. Perform reconnaissance to discover internal/private package names used by the target. 2. Identify the target's package ecosystems and registry configuration. …
Read the whole file at its exact version.
How to install
mdr add snailsploit/claude-red/offensive-dependency-confusion@sha256:e394e3eb2467b93dThe line at the top of this page pins the label git:20260825.900e4c2, 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_cfzzqecym36aj5cz)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, all committed on Aug 25, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260825.900e4c2 latest | 2026-08-25 | 900e4c2 | 23,800 B | A | view · diff |
| git:20260825.1885f44 | 2026-08-25 | 1885f44 | 24,639 B | A | view · diff |
| git:20260825.8cffe5d | 2026-08-25 | 8cffe5d | 27,147 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (23800 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
- pass: No script tag
Source
snailsploit/claude-red · 10,442 stars · license MIT · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_cfzzqecym36aj5cz GET https://markdownregistry.com/api/v1/resolve?ref=snailsploit/claude-red/offensive-dependency-confusion GET https://markdownregistry.com/api/v1/blob/e394e3eb2467b93d8cf65c3db1a2bc01d27c53c6d2ea704b18f6ef10bc3fcb8b
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.
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