Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pyjwt Project | Pyjwt | < 2.13.0 |
Related Weaknesses (CWE)
References
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-xgmm-8j9v-c9wxExploitVendor 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
FAQ
What is CVE-2026-48526?
CVE-2026-48526 is a vulnerability with a CVSS score of 7.4 (HIGH). 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 ...
How severe is CVE-2026-48526?
CVE-2026-48526 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48526?
Check the references section above for vendor advisories and patch information. Affected products include: Pyjwt Project Pyjwt.