aegis-deserialization SKILL.md skillA
aegis-deserialization 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-deserialization@git:20260826.9702747Pins git:20260826.9702747 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- as-foss/aegis-skills
- Path
skills/code/deserialization/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260826.9702747, committed Aug 26, 2026
- First version recorded
- Aug 25, 2026
- Size
- 23,034 bytes
- Repository stars
- 16
- License
- Apache-2.0
Detect unsafe deserialization of untrusted data (native serializers, XXE, YAML, prototype pollution) across all major languages.
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
# Check Module DESER — Deserialization & Object Injection ## Scope & Objectives Find every place where untrusted data (network input, message queues, files, cookies, cache entries) is converted back into executable objects or rich data structures, and determine whether an attacker can abuse that conversion to: 1. Execute code (native deserialization gadget chains), 2. Read files or reach internal services (XXE), 3. Alter application logic without code execution (prototype pollution, object injection, type confusion). Covered here: native object serialization (pickle, Java, .NET, PHP, Ruby), XML parsing incl. external entities (XXE), YAML loading, and server-side JavaScript prototype pollution. Out of scope (cross-referenced): mass assignment (API), SSRF from URL fetchers (SSRF), decompression/entity-bomb resource math (DOS), JWT/token integrity (AUTHN). ## Prerequisites & Vocabulary Zero-background primer: the terms this module uses, one line each. Deeper plain-language explanations for every class live in the repository GUIDE.md glossary. - **deserialization**: turning raw bytes (network data, files, cookies) back into live program objects …
Read the whole file at its exact version.
How to install
mdr add as-foss/aegis-skills/aegis-deserialization@sha256:5fc97119d15334e0The 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_wyfk4mrglqyeerky)
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 | 23,034 B | A | view · diff |
| git:20260825.85624bc | 2026-08-25 | 85624bc | 23,035 B | A | view · diff |
| git:20260825.244c198 | 2026-08-25 | 244c198 | 21,979 B | A | view |
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 (23034 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
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_wyfk4mrglqyeerky GET https://markdownregistry.com/api/v1/resolve?ref=as-foss/aegis-skills/aegis-deserialization GET https://markdownregistry.com/api/v1/blob/5fc97119d15334e0fe231c59d6caeadafd18e59d7b729e24e9dcb1e16b5c0745
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.