Unsupported Typ: undefined

[markusmagomedov]

Running jwt-cracker -t "eyJ1c2VyIjp7ImlzX2FkbWluIjpmYWxzZSwidXNlcm5hbWUiOiJCb2IifX0.Z7uePQ.olZeWRbDWvNCZqFmHUuVdszOZfU" -d "G:\ctf\wordlists\rockyou.txt" returns Unsupported Typ: undefined

[lmammino]

Thanks for reporting this. The error message could definitely be better (happy to consider a PR to improve this) but the problem is that your token is not compliant to the JWT spec

[markusmagomedov]

Okay, thank you for such a fast reply!