testing-web-cache-attacks SKILL.md skillA
testing-web-cache-attacks from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/testing-web-cache-attacks@git:20260816.a0bc1d1Pins git:20260816.a0bc1d1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/testing-web-cache-attacks/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260816.a0bc1d1, committed Aug 16, 2026
- Size
- 6,558 bytes
- Repository stars
- 26
- License
- MIT
Test how a caching layer between users and an application can be turned against it: cache poisoning (getting a harmful response stored and served to other users) and cache deception (tricking the cache into storing a victim's private response where the attacker can read it). Covers finding the cache key and unkeyed inputs, identifying cacheable responses, poisoning through unkeyed headers, and deceiving path-based caching into storing authenticated content. Use when reviewing a CDN, a reverse…
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
# Testing web cache attacks: the bug is the key, not the app A shared cache trades correctness for speed by serving one stored response to many users, and that sharing is the vulnerability. If an attacker can influence what gets stored (poisoning), everyone downstream receives their payload; if an attacker can make the cache store someone else's private response under a key the attacker controls (deception), they read data that was never theirs. Both live in the gap between what the cache keys on and what actually determines the response. ## When to use - You are reviewing a CDN, a reverse proxy, or any shared HTTP cache in front of an app. - Responses that depend on headers or user identity are served through a cache. - You are assessing whether authenticated content can be cached and re-served. ## Scope check Test caches and apps you own or are authorized to test. Use benign markers and your own accounts; do not poison responses served to real users or read real users' data. If you can't name the authorization, stop. ## The loop 1. **Map the cache and its key.** Identify the caching layer in front of the app and …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/testing-web-cache-attacks@sha256:17b8c9b8c4ff8889The line at the top of this page pins the label git:20260816.a0bc1d1, 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_qghfjr26lnuacgt2)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 16, 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 (6558 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
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qghfjr26lnuacgt2 GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/testing-web-cache-attacks GET https://markdownregistry.com/api/v1/blob/17b8c9b8c4ff8889083058e186c8a0fd0d9618a437f1db5524dcbdd44e410817
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.