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VULNERABILITIES

CVE-2026-48526 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: redhat-SADPCVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:25902 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:25928 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:26206 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:28571 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:30076 redhat-SADP

see all 38 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-287Improper Authentication[email protected]
CWE-347Improper Verification of Cryptographic Signatureredhat-SADP
CWE-347Improper Verification of Cryptographic Signature[email protected]

Affected Products

ProductVersions
pyjwt project pyjwt
< 2.13.0

CPE

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

Remediation

  • No remediation found in references.

Change History

28 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-48526
NVD Published Date:
May 28, 2026
NVD Last Modified:
Sep 10, 2026
Source:
[email protected]
CVE-2026-48526 Details - Not Deferred