insecure-deserialization
Untrusted data deserialized by an unsafe deserializer, enabling object injection / RCE.
Skill by jaiswalakshansh
Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/jaiswalakshansh-insecure-deserialization
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: data
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/insecure-deserialization
What's inside
- Skill name
insecure-deserialization- Description
- Untrusted data deserialized by an unsafe deserializer, enabling object injection / RCE.
- License
- MIT
- Instructions
- 20 lines in SKILL.md · view on GitHub
Files (1)
- SKILL.md
SKILL.md (first lines)
# Insecure Deserialization ## Recon Find unsafe deserialization sinks fed by input: `pickle.loads`, `cPickle`, `yaml.load` (without `SafeLoader`), `marshal.loads`, `jsonpickle.decode`, `dill.loads`, Java `ObjectInputStream`. Sources: request bodies, cookies, cache entries, message payloads. ## Verify (false-positive reduction) 1. Is the deserializer actually unsafe? `yaml.safe_load`, `json.loads`, and `pickle` on trusted-only data are not this bug. 2. Is the serialized blob attacker-controlled (not signed/HMAC-verified first)? 3. Signed/verified payloads (e.g. itsdangerous) before deserialization are safe. ## Evidence Source→sink path and the deserializer call. Note: an RCE PoC for pickle is constructible (a `__reduce__` gadget) but Crucible does not auto-run it against a live app; the finding stays suspected unless proven.
From jaiswalakshansh/crucible, MIT.
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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Jul 23, 2026 (3 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/jaiswalakshansh/crucible
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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Cite this page
insecure-deserialization skill. Agent Mart. https://agentmart.dev/skills/jaiswalakshansh-insecure-deserialization (last updated 2026-10-24)