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.
References
Link Resource
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-xgmm-8j9v-c9wx Exploit Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:25902
https://access.redhat.com/errata/RHSA-2026:25928
https://access.redhat.com/errata/RHSA-2026:26206
https://access.redhat.com/errata/RHSA-2026:28571
https://access.redhat.com/errata/RHSA-2026:30076
https://access.redhat.com/errata/RHSA-2026:30088
https://access.redhat.com/errata/RHSA-2026:30089
https://access.redhat.com/errata/RHSA-2026:33683
https://access.redhat.com/errata/RHSA-2026:34160
https://access.redhat.com/errata/RHSA-2026:34365
https://access.redhat.com/errata/RHSA-2026:34374
https://access.redhat.com/errata/RHSA-2026:35835
https://access.redhat.com/errata/RHSA-2026:35836
https://access.redhat.com/errata/RHSA-2026:35837
https://access.redhat.com/errata/RHSA-2026:35845
https://access.redhat.com/errata/RHSA-2026:36350
https://access.redhat.com/errata/RHSA-2026:37275
https://access.redhat.com/errata/RHSA-2026:40967
https://access.redhat.com/errata/RHSA-2026:41066
https://access.redhat.com/errata/RHSA-2026:42132
https://access.redhat.com/errata/RHSA-2026:42142
https://access.redhat.com/errata/RHSA-2026:42144
https://access.redhat.com/errata/RHSA-2026:42644
https://access.redhat.com/errata/RHSA-2026:42796
https://access.redhat.com/errata/RHSA-2026:43038
https://access.redhat.com/errata/RHSA-2026:48085
https://access.redhat.com/errata/RHSA-2026:50222
https://access.redhat.com/errata/RHSA-2026:50223
https://access.redhat.com/errata/RHSA-2026:50263
https://access.redhat.com/errata/RHSA-2026:50319
https://access.redhat.com/errata/RHSA-2026:50336
https://access.redhat.com/errata/RHSA-2026:50340
https://access.redhat.com/errata/RHSA-2026:50904
https://access.redhat.com/errata/RHSA-2026:60520
https://access.redhat.com/security/cve/CVE-2026-48526
https://bugzilla.redhat.com/show_bug.cgi?id=2482734
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48526.json
Configurations

Configuration 1 (hide)

cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*

History

26 Oct 2026, 13:10

Type Values Removed Values Added
Summary
  • (es) PyJWT es una implementación de JSON Web Token en Python. Antes de 2.13.0, cuando el verificador está decodificando JSON Web Tokens, mientras soporta tanto algoritmos asimétricos como HMAC, la biblioteca no valida el uso de JSON Web Keys en el algoritmo HMAC, permitiendo al atacante usar la clave pública del emisor como clave secreta para el algoritmo HMAC. Esta vulnerabilidad se corrige en 2.13.0.

Information

Published : 2026-05-28 16:16

Updated : 2026-10-26 13:10


NVD link : CVE-2026-48526

Mitre link : CVE-2026-48526

CVE.ORG link : CVE-2026-48526


JSON object : View

Products Affected

pyjwt_project

  • pyjwt
CWE
CWE-287

Improper Authentication

CWE-347

Improper Verification of Cryptographic Signature