Individual skill
jwt-attacks
Forge and re-sign captured JWTs to test signature validation - algorithm confusion (alg:none, RS256 to HS256), key injection, and secret cracking. Use when testing JWT or bearer-token auth.
skills/applicative-pentest/jwt-attacks/SKILL.md
Source commit 0c1bc93fd5124e7a862d61c1b434f32ba8790e3a
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- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Not checked yet
- Last checked
- Nov 5, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 153
- Repository last updated
- Nov 7, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai-security Repository topic
- ai-skills Repository topic
- security-skills Repository topic
- dynamic-workflow Repository topic
- testing Derived category
Files and excerpt
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## Contents
- Scope & authorization
- Step 0 - locate the token and establish a baseline
- Step 1 - offline HMAC secret crack (passive)
- Step 2 - signature stripping (active)
- Step 3 - alg:none family (active)
- Step 4 - kid manipulation (active)
- Step 5 - self-signed key injection: jwk / jku (active)
- Step 6 - RS256->HS256 algorithm confusion (active)
- Runnable snippets
- Output
## Scope & authorization
