dreadnode/capabilities · capabilities/web-security/skills/browser-side-channel/SKILL.md

browser-side-channel skillB

browser-side-channel is agent-read markdown (skill) from dreadnode/capabilities: Browser-based side channel attacks for cross-origin data leaks via connection pool exhaustion, ETag oracles, timing differentials, and ORB status-code XS-Leaks revived through service-worker destination rewriting. Use when direct XSS fails but cross-origin information leakage is needed..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add dreadnode/capabilities/browser-side-channel@git:20260814.2a9dc38
Exact content
mdr add dreadnode/capabilities/browser-side-channel@sha256:c163abef2d693183

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_wx7ftekfrmml5ozb.svg)](https://markdownregistry.com/a/art_wx7ftekfrmml5ozb)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260814.2a9dc38 latest2026-08-14 2a9dc38 7,432 BB view · diff
git:20260529.8f6ea0e2026-05-29 8f6ea0e 4,439 BB view · diff
git:20260504.2a643742026-05-04 2a64374 3,533 BA view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • 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 (7432 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

Source

GitHub

dreadnode/capabilities · 15 stars · license none · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_wx7ftekfrmml5ozb
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/browser-side-channel
GET https://markdownregistry.com/api/v1/blob/c163abef2d693183ed455a1c4c74bca0e384d37e7fb3d2869c18161c2314ac06

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.