CVE-2026-28802
2 advisories.
PyPI/authlib CVE-2026-28802: high
Authlib: Setting `alg: none` and a blank signature appears to bypass signature verification
Action: Upgrade authlib to 1.6.7 or later.
pip install authlib==1.6.7Affected
| introduced | fixed | last affected |
|---|---|---|
| 1.6.5 | 1.6.7 | - |
Fixed versions
| 1.6.7 |
Sources
- osv: GHSA-7wc2-qxgw-g8gg
- https://github.com/authlib/authlib/security/advisories/GHSA-7wc2-qxgw-g8gg
- https://nvd.nist.gov/vuln/detail/CVE-2026-28802
- https://github.com/authlib/authlib/commit/a61c2acb807496e67f32051b5f1b1d5ccf8f0a75
- https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7
- https://github.com/authlib/authlib
CVE-2026-28802 · published · modified · JSON
PyPI/authlib CVE-2026-28802: critical 9.8
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 empt
Action: Upgrade authlib to 1.6.7 or later.
pip install authlib==1.6.7Affected
| introduced | fixed | last affected |
|---|---|---|
| 1.6.5 | 1.6.7 | - |
Fixed versions
| 1.6.7 |
Sources
- osv: PYSEC-2026-2118
- https://access.redhat.com/security/cve/CVE-2026-28802
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28802.json
- https://access.redhat.com/errata/RHSA-2026:19375
- https://access.redhat.com/errata/RHSA-2026:4942
- https://access.redhat.com/errata/RHSA-2026:5168
- https://access.redhat.com/errata/RHSA-2026:5665
- https://access.redhat.com/errata/RHSA-2026:6309
- https://access.redhat.com/errata/RHSA-2026:6568
- https://bugzilla.redhat.com/show_bug.cgi?id=2445120
- https://github.com/authlib/authlib/commit/a61c2acb807496e67f32051b5f1b1d5ccf8f0a75
- https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7
- https://github.com/authlib/authlib/security/advisories/GHSA-7wc2-qxgw-g8gg
CVE-2026-28802 · published · modified · JSON