aegis-ssrf-url-security SKILL.md skillC
aegis-ssrf-url-security from as-foss/aegis-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add as-foss/aegis-skills/aegis-ssrf-url-security@git:20260826.9702747Pins git:20260826.9702747 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- C, 15 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- as-foss/aegis-skills
- Path
skills/code/ssrf-url-security/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260826.9702747, committed Aug 26, 2026
- First version recorded
- Aug 25, 2026
- Size
- 71,110 bytes
- Repository stars
- 16
- License
- Apache-2.0
Audit playbook module for server-side request forgery (CWE-918) and open-redirect failures (CWE-601), covering user-influenced URLs fetched by servers, sink catalogs across all mainstream HTTP client libraries, redirect/DNS/parser filter bypasses, cloud metadata and orchestration-endpoint exposure, and allowlist-plus-pinning remediations.
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
## Scope & Objectives ### Objective Audit every code path where the server issues an outbound network request whose destination is influenced by user input, and every code path where the server tells a browser to navigate to a user-influenced URL. For each finding produce: file:line evidence of source-to-sink flow, the exact validation gap (none, bypassable, or post-validation), a static-first reproduction recipe, a severity with rationale, and a framework-correct fix built on parse-validate-pin-revalidate. ### In Scope | Class | Typical finding | Primary CWE | |---|---|---| | Classic SSRF | `url` parameter fetched with `requests.get()` / `fetch()` / `http.Get()` with no host validation; internal hosts reachable | CWE-918 | | Partial SSRF / filter-bypass SSRF | Scheme or hostname allowlist defeated by IP encodings (`2130706433`), userinfo tricks (`http://trusted@169.254.169.254/`), backslash parsing splits, alternate IPv6 forms | CWE-918 | | Redirect-following amplification | Allowlist checked on the original URL, then 3xx hops followed to internal/metadata hosts unvalidated | CWE-918 | …
Read the whole file at its exact version.
How to install
mdr add as-foss/aegis-skills/aegis-ssrf-url-security@sha256:b5c7126257cbdda8The line at the top of this page pins the label git:20260826.9702747, 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_6n64ovvo5xvmpabx)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 25, 2026 and Aug 26, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260826.9702747 latest | 2026-08-26 | 9702747 | 71,110 B | C | view · diff |
| git:20260825.85624bc | 2026-08-25 | 85624bc | 71,111 B | C | view · diff |
| git:20260825.244c198 | 2026-08-25 | 244c198 | 69,997 B | C | view |
Audit of the latest version
- fail: No link to a raw IP address (matched: http://169.254.169.254)
- 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 (71110 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
as-foss/aegis-skills · 16 stars · license Apache-2.0 · pushed 2026-08-26 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_6n64ovvo5xvmpabx GET https://markdownregistry.com/api/v1/resolve?ref=as-foss/aegis-skills/aegis-ssrf-url-security GET https://markdownregistry.com/api/v1/blob/b5c7126257cbdda8fdaa596761bdd40bcd16838be343c8e296fbf98b2d94d995
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.