web-cache-deception-path SKILL.md skillA
web-cache-deception-path 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/web-cache-deception-path@git:20260504.2a64374Pins git:20260504.2a64374 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/web-cache-deception-path/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260504.2a64374, committed May 4, 2026
- Size
- 1,513 bytes
- Repository stars
- 22
- License
- MIT
Web cache deception via path delimiter confusion between CDN/cache and origin server. Use when CDN (Cloudflare, Akamai, Fastly, CloudFront) or cache layer detected.
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
# Web Cache Deception (Path Delimiters) ## Pattern - CDN/cache present: `cf-cache-status`, `x-cache`, `age`, `x-served-by` headers - Cache rules based on file extension or path prefix - Origin and cache disagree on URL path parsing/normalization - Sensitive endpoints return user-specific data (profile, session, tokens) ## Probe **Path delimiter confusion** — cache sees static file, origin serves dynamic content: ``` /account/settings/anything.css /api/me/..%2fstatic/x.js /share/%2F..%2Fapi/auth/session /profile;/static/img.png /account/.css ``` **Delimiters to test** (parsed differently by cache vs origin): - Semicolon: `/account;x.css` | Encoded slash: `%2F..%2F` - Dot segment: `/api/me/./x.css` | Null byte: `%00.css` - Fragment-like: `/account%23.css` | Double encoding: `%252e%252e` Send as victim (authenticated), then fetch same URL unauthenticated. If cached response contains victim's data, WCD confirmed. ## Indicators - `Cache-Status: HIT` (or `cf-cache-status: HIT`) on crafted URL - Unauthenticated request returns authenticated user's data from cache - `Age` header increases on repeated requests (entry is cached) ## Chain With …
Read the whole file at its exact version.
How to install
mdr add dreadnode/capabilities/web-cache-deception-path@sha256:261f99e6fe535249The line at the top of this page pins the label git:20260504.2a64374, 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_llacrvvuuhqmnlsk)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 4, 2026.
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 (1513 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_llacrvvuuhqmnlsk GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/web-cache-deception-path GET https://markdownregistry.com/api/v1/blob/261f99e6fe5352491466620caade90f1efeb4607bb0c5aa77a7dea256c32fa0c
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.