archive-path-traversal SKILL.md skillA
archive-path-traversal from dreadnode/capabilities is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dreadnode/capabilities/archive-path-traversal@git:20260612.fa6fe73Pins git:20260612.fa6fe73 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dreadnode/capabilities
- Path
capabilities/web-security/skills/archive-path-traversal/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260612.fa6fe73, committed Jun 12, 2026
- First version recorded
- May 29, 2026
- Size
- 5,043 bytes
- Repository stars
- 22
- License
- MIT
Craft malicious archives (ZIP/TAR) to test extraction vulnerabilities including Zip Slip, symlink attacks, hardlink collisions, setuid escalation, polyglot bypasses, and Unicode path confusion. Use when a target accepts archive uploads or extracts archives server-side. Triggers on "archive upload", "zip slip", "tar extraction", "symlink", "hardlink", "polyglot", "archive alchemist", "extraction vulnerability".
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
# Archive Path Traversal & Extraction Vulnerabilities Use this skill when the target accepts archive uploads (ZIP, TAR, tar.gz, tar.xz, tar.bz2) or otherwise extracts archives server-side. The web-security runtime includes **archivealchemist** at `~/git/archivealchemist/archive-alchemist.py` for crafting malicious archives. ## When to Use Use archive extraction testing when you observe: - Upload endpoints accepting `.zip`, `.tar`, `.tar.gz`, `.tar.xz`, `.tar.bz2` - Server-side archive extraction (file import, bulk upload, theme/plugin import) - Features that restore/back up data from archives - Any flow where archive entries become files on disk ## Tool Reference Tool path: `python3 ~/git/archivealchemist/archive-alchemist.py <archive> <command> [options]` ### Commands | Command | Purpose | |---|---| | `add` | Add files, symlinks, hardlinks, directories | | `replace` | Replace entries or sync from a directory | | `append` | Append content to an existing entry | | `modify` | Change mode, uid, gid, mtime, convert to symlink/hardlink | | `remove` / `rm` | Remove entries | | `list` / `ls` | List archive contents | …
Read the whole file at its exact version.
How to install
mdr add dreadnode/capabilities/archive-path-traversal@sha256:f54f6a58f09dae5eThe line at the top of this page pins the label git:20260612.fa6fe73, 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_stywndqksu4ffm5n)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 29, 2026 and Jun 12, 2026, about one every 14 days. Its first recorded version is graded B and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260612.fa6fe73 latest | 2026-06-12 | fa6fe73 | 5,043 B | A | view · diff |
| git:20260529.17de87f | 2026-05-29 | 17de87f | 4,313 B | B | 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 (5043 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
dreadnode/capabilities · 22 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_stywndqksu4ffm5n GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/archive-path-traversal GET https://markdownregistry.com/api/v1/blob/f54f6a58f09dae5e312eceba28e77061a08bef1c48b32671e7376b2a8092eeb1
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.