cvedb.io
CVE-2026-28802
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2026-03-06T07:16:01.053 · Last modified 2026-07-01T13:16:56.410

Summary

Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature verification step without any changes to the application code when a failure was expected.. This issue has been patched in version 1.6.7.

Affected products

authlib — authlib

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.