hunt-prototype-pollution SKILL.md skillA
hunt-prototype-pollution from galact-byte/galact-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add galact-byte/galact-skills/hunt-prototype-pollution@git:20260806.1b94651Pins git:20260806.1b94651 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- galact-byte/galact-skills
- Path
skills/hunt-prototype-pollution/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260806.1b94651, committed Aug 6, 2026
- Size
- 4,134 bytes
- Repository stars
- 7
- License
- a license file GitHub does not identify
在授权渗透测试中挖掘 JavaScript 原型污染（prototype pollution，服务端 Node.js 与客户端）。当目标把用户可控的键名递归合并进对象（merge/extend/set/clone、JSON body、query 解析）时使用——典型场景：用 `__proto__`/`constructor.prototype` 注入属性，污染全局原型，进而 DoS、改逻辑、配合 gadget 提权到 XSS/RCE。适用目标类型 Web / REST API（Node.js） / 前端。触发场景包括用户说"测下原型污染""这个 merge 能不能 __proto__""污染原型打 RCE/XSS""lodash/jquery 有没有污染点"。输出：污染点 + 可用 gadget 判定 + 反射证据的 finding（含 killed 记录）。.
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
# hunt-prototype-pollution · 原型污染猎杀 只解决**原型污染一类**：找到"用户可控键名进入递归合并/属性赋值"的点，用 `__proto__`/`constructor.prototype` 往 `Object.prototype` 注入属性，再看能否被下游 gadget 放大（模板/HTML sink→XSS、spawn/sourceURL→RCE、逻辑标志→提权）。判定靠**注入的属性在响应/行为中被观测到**。 污染是全局副作用，可能影响其他用户请求。默认注入**无害探针属性**（如 `huntpp`），确认污染后再评估 gadget，破坏性/持久化操作需授权。污染向量、常见 gadget、真实报告见 `reference.md`。 ## Scope（授权范围） **先确认授权。** 全局原型污染可能影响并发请求与后续行为。 落实：授权目标、测试窗口（污染可能残留到进程重启）、允许深度（仅探针 / 允许 gadget PoC）。任一不清楚就停下问。 ## Goal 判定用户可控键名能否污染 `Object.prototype`，并评估可达 gadget 与影响（DoS / 逻辑绕过 / XSS / RCE），留存注入属性被反射或行为改变的证据。 ## Workflow `scope-check → recon → hunt → validate → report`。 ### 1. scope-check - **动作**：写 `evidence/scope.txt`。 - **命令**：`bash tools/recon.sh <target> --scope-only`。 - **终止条件**：scope 明确，否则 KILL。 ### 2. recon - **动作**：枚举吃 JSON body / 深合并 / query 的入口（配置、设置、批量更新、`merge`/`extend` 风格 API）。 - **输出**：`recon/endpoints.json`。 - **命令**：`bash tools/recon.sh <target>`。 - **终止条件**：至少 1 个候选入口。 ### 3. hunt - **动作**：对每个入口发多种污染向量（`__proto__[huntpp]`、`constructor[prototype][huntpp]`、JSON 嵌套 `__proto__`），再请求一个**回显对象属性**的端点或复用同接口，看 `huntpp` 是否出现在返回/默认值里。 - **输出**：`candidates.json`。 …
Read the whole file at its exact version.
How to install
mdr add galact-byte/galact-skills/hunt-prototype-pollution@sha256:2a831ff5e187e367The line at the top of this page pins the label git:20260806.1b94651, 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_wp6at4xjzwyxpx7h)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 6, 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 (4134 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
galact-byte/galact-skills · 7 stars · license a license file GitHub does not identify · pushed 2026-10-12 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_wp6at4xjzwyxpx7h GET https://markdownregistry.com/api/v1/resolve?ref=galact-byte/galact-skills/hunt-prototype-pollution GET https://markdownregistry.com/api/v1/blob/2a831ff5e187e36797a1947cbe5c98e758aab358736cec8b1ffc3f712bf7f7f8
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.