Individual skill
jwt-attack
Decode, forge, brute JWTs when Bearer auth header is seen.
recon/jwt-attack/SKILL.md
Source commit 1260244136edc6ae698d76d3d526f503e322778d
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 1,352
- Repository last updated
- Nov 7, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- bug-bounty Repository topic
- cloud-security Repository topic
- firebase-hacking Repository topic
- hermes-agent Repository topic
- jwt-attacks Repository topic
- offensive-security Repository topic
- penetration-testing Repository topic
- reconnaissance Repository topic
- red-team Repository topic
- security-automation Repository topic
- recon Declared skill tag
- jwt Declared skill tag
- token Declared skill tag
- forge Declared skill tag
- brute-force Declared skill tag
- engineering Derived category
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Browse files
Read excerpt
# JWT Attack Skill
Complete JWT attack methodology — decode without verification, algorithm confusion (alg:none, RS256→HS256), weak secret brute force (hashcat/john/simple), kid injection, expired token reuse, and hardcoded JWT extraction from JS bundles. Confirmed on enterprise-portal (JWT-based sessions), fintech-processor (315 JWT tokens in Efí bank logs), fitness-chain (3 JWT sessions with 2027 expiry), delivery-platform (hardcoded JWTs in JS bundles), and gov-finance-portal (JWT secret leaked in Vite source).
## When to Use
[Credential-related source omitted]
- JavaScript bundles contain `eyJ...` token patterns.
- After `js-secrets-extraction` finds JWT tokens.
- After `api-noauth-hunt` needs token forging for auth bypass.
[Credential-related source omitted]
## Prerequisites
