hunting-server-side-rendering-and-svg-image-abuse SKILL.md skillA
hunting-server-side-rendering-and-svg-image-abuse 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/hunting-server-side-rendering-and-svg-image-abuse@git:20260903.6dac719Pins git:20260903.6dac719 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/hunting-server-side-rendering-and-svg-image-abuse/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260903.6dac719, committed Sep 3, 2026
- Size
- 10,292 bytes
- Repository stars
- 26
- License
- MIT
Hunt abuse of server-side renderers of user-supplied markup, such as headless-browser PDF or screenshot generation, SVG rasterization, thumbnailers, and chart or document renderers, where the renderer fetches remote or local resources, follows redirects, executes embedded script, or reads local files while producing output. Use when untrusted HTML, SVG, or a URL is handed to a rendering component server-side. Covers server-side request forgery including to cloud metadata, local file disclosure…
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
# Hunting server-side rendering and SVG image abuse: when generating a document fetches the attacker's URL To turn a user's content into a PDF, a screenshot, or a thumbnail, a server hands markup or a URL to a renderer, and a renderer is a small browser: it resolves links, loads images, follows redirects, and often runs script and reads local files. When that content is attacker-controlled, the renderer becomes a request engine operating from inside the network, fetching an internal address or cloud-metadata endpoint, reading a local file through a file scheme or an external entity, calling out to a host that proves the render happened, or executing script that reads the rendered page. The bug is not the markup; it is a renderer left free to resolve whatever the document points at, running server-side with network and file reach the user never should have. You find these by locating every server-side render of untrusted content and reading what the renderer is allowed to resolve. ## When to use - A service renders user-supplied HTML or SVG server-side into a PDF, an image, a screenshot, or a preview. …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/hunting-server-side-rendering-and-svg-image-abuse@sha256:fa5503fb0c053e90The line at the top of this page pins the label git:20260903.6dac719, 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_lhtjf5kwswgkgqtu)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 3, 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 (10292 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_lhtjf5kwswgkgqtu GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/hunting-server-side-rendering-and-svg-image-abuse GET https://markdownregistry.com/api/v1/blob/fa5503fb0c053e90277a60d29755e2c357d02de1a4b35956967e60b9531a9369
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.