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CVE-2026-28802

Published: Mar 6, 2026

Modified: Mar 6, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
authlib	authlib	affected `>= 1.6.5, < 1.6.7`

Weaknesses (CWE)

References

https://github.com/authlib/authlib/security/advisories/GHSA-7wc2-qxgw-g8gg

x_refsource_CONFIRM

https://github.com/authlib/authlib/commit/a61c2acb807496e67f32051b5f1b1d5ccf8f0a75

x_refsource_MISC

https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7

x_refsource_MISC

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