PYSEC-2026-2118
At a glance
- Published
- Updated
- CVE
- CVE-2026-28802
- Aliases
- GHSA-7wc2-qxgw-g8gg
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 packages
| Package | Versions |
|---|---|
| PyPI · authlib | introduced 1.6.5, fixed 1.6.7 |
References
- https://access.redhat.com/security/cve/CVE-2026-28802 WEB
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28802.json WEB
- https://access.redhat.com/errata/RHSA-2026:19375 ADVISORY
- https://access.redhat.com/errata/RHSA-2026:4942 ADVISORY
- https://access.redhat.com/errata/RHSA-2026:5168 ADVISORY
- https://access.redhat.com/errata/RHSA-2026:5665 ADVISORY
- https://access.redhat.com/errata/RHSA-2026:6309 ADVISORY
- https://access.redhat.com/errata/RHSA-2026:6568 ADVISORY
- https://bugzilla.redhat.com/show_bug.cgi?id=2445120 REPORT
- https://github.com/authlib/authlib/commit/a61c2acb807496e67f32051b5f1b1d5ccf8f0a75 FIX
- https://github.com/authlib/authlib/commit/b87c32ed07b8ae7f805873e1c9cafd1016761df7 FIX
- https://github.com/authlib/authlib/security/advisories/GHSA-7wc2-qxgw-g8gg EVIDENCE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |