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EXPOSURES › CVE-2026-28802

CVE-2026-28802

CRITICAL
DETAIL
SourceNVD · cve Published2026-03-06 CVSS9.8 Referencehttps://nvd.nist.gov/vuln/detail/CVE-2026-28802 ↗
SHAME 35/100

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 t

▸ RECOMMENDED ACTION  Critical severity — schedule patching of the affected products.

PLAYERS IMPLICATED
authlib · vendorauthlib · product
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.

AFFECTED FEDRAMP PRODUCTS · 0
No correlated FedRAMP products.