auditing-websocket-connection-trust SKILL.md skillA
auditing-websocket-connection-trust 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/auditing-websocket-connection-trust@git:20260825.70f8609Pins git:20260825.70f8609 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/auditing-websocket-connection-trust/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260825.70f8609, committed Aug 25, 2026
- Size
- 9,832 bytes
- Repository stars
- 26
- License
- MIT
Audit a WebSocket endpoint for trust established once at the handshake and never re-checked, so a cross-site page or a post-handshake message drives a privileged action, after the origin check and the credential source are resolved. Covers a missing or always-true origin check on the upgrade with ambient-cookie authentication, authentication at the handshake with no per-message authorization, a message treated as transport into a downstream injection sink, an unbounded frame or connection…
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
# Auditing WebSocket connection trust: trust checked once at the upgrade, never per message A WebSocket endpoint fails where it establishes trust once, at the upgrade, and never re-checks it. If the handshake authenticates purely from an ambient cookie and does not validate the origin, any web page can open an authenticated socket on the user's behalf (cross-site hijacking); if it authenticates at the handshake but never authorizes individual messages, a connection can escalate mid-stream. You audit it by resolving how the handshake authenticates (an ambient cookie, or an unpredictable token a cross-site page cannot read) and whether the origin is enforced, then following each privileged message to see whether it is re-authorized. A known false-positive trap lives here: an origin check delegated to a proxy is only a defense if the proxy actually rejects, so confirm the backstop. The wss certificate check belongs to the transport skill. ## When to use - You are reviewing a WebSocket upgrade handler, its origin check, and its per-message dispatch. - The endpoint authenticates at the handshake, from a cookie or a token, and then handles messages. …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/auditing-websocket-connection-trust@sha256:ddcf55a5c6a109b3The line at the top of this page pins the label git:20260825.70f8609, 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_ijvxkgdspqminaf3)
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Versions
The registry has recorded 1 version of this file, committed on Aug 25, 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 (9832 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_ijvxkgdspqminaf3 GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-websocket-connection-trust GET https://markdownregistry.com/api/v1/blob/ddcf55a5c6a109b3adf88b3f2d57393f6a8e2e4c61ae0c703e4f94459d43a4d6
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.