CVE-2026-28802
Fixed in a distro release EPSS <1%CVSS 7.7
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.
Products: authlib, Red Hat Ansible Automation Platform 2.6, Red Hat Quay 3.10, Red Hat Quay 3.12, Red Hat Quay 3.15, Red Hat Quay 3.16, Red Hat Quay 3.9, Red Hat Satellite 6
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | authlib | 1.6.7 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | airflow-3 | 3.1.8-r0 |
| Debian 13 | python-authlib | no fix |
| Debian 14 | python-authlib | 1.6.7-1 |
| Ubuntu 25.10 | python-authlib | no fix |
| Wolfi | airflow-3 | 3.1.8-r0 |