CVE-2026-48526
PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.
Published:May 28, 2026
Last Modified:Aug 28, 2026
EPS:May 28, 2026
EPSS Score:0.00395
CVSS Score:7.4
Affected Products
Vendor
Product
Action
Vendor
Jpadilla
Product
Pyjwt
Jpadilla
Pyjwt
Vendor
Pyjwt Project
Product
Pyjwt
Pyjwt Project
Pyjwt
Common Weakness Enumeration
Common Attack Pattern Enumeration and Classification (CAPEC)
Related CVEs
References
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
