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CVSS v3.1
6.8
EPSS
0.98%
Published
Mar 20, 2024
Modified
Dec 22, 2025
Public PoC / Exploit (1)
All weaponized →Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.
Description
JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to version 1.5.6, an attacker can cause a denial of service attack by passing in a malicious JWE Token with a high compression ratio. When the server processes this token, it will consume a lot of memory and processing time. Version 1.5.6 fixes this vulnerability by limiting the maximum token length.
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:HWeaknesses (CWE)
References (6)