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Vulnerability DatabaseCVE-2026-28802

CVE-2026-28802: 
Python vulnerability analysis and mitigation

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.

Source: NVD

Related Python vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

GHSA-cjcx-jfp2-f7m2HIGH8.7
  • PythonPython
  • pretalx
NoYesApr 18, 2026
CVE-2026-41241HIGH8.7
  • PythonPython
  • pretalx
NoYesApr 18, 2026
CVE-2026-40491MEDIUM6.5
  • PythonPython
  • gdown
NoYesApr 18, 2026
GHSA-jm8c-9f3j-4378MEDIUM6.1
  • PythonPython
  • pretalx
NoYesApr 18, 2026
CVE-2026-41426MEDIUM6.1
  • PythonPython
  • pretalx
NoYesApr 18, 2026

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