CVE-2026-28498 Authlib is a Python library which builds OAuth and OpenID Connect servers
Description
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a library-level vulnerability was identified in the Authlib Python library concerning the validation of OpenID Connect (OIDC) ID Tokens. Specifically, the internal hash verification logic (_verify_hash) responsible for validating the at_hash (Access Token Hash) and c_hash (Authorization Code Hash) claims exhibits a fail-open behavior when encountering an unsupported or unknown cryptographic algorithm. This flaw allows an attacker to bypass mandatory integrity protections by supplying a forged ID Token with a deliberately unrecognized alg header parameter. The library intercepts the unsupported state and silently returns True (validation passed), inherently violating fundamental cryptographic design principles and direct OIDC specifications. This issue has been patched in version 1.6.9.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Red Hat Ansible Automation Platform 2.6 1774417022 | premières → < 1774417022 | 1774417022 |
| Red Hat Quay 3.12 1775253092 | premières → < 1775253092 | 1775253092 |
| Red Hat Quay 3.15 1775169219 | premières → < 1775169219 | 1775169219 |
| Red Hat Quay 3.16 1775169226 | premières → < 1775169226 | 1775169226 |
| Red Hat Quay 3.16 1775069491 | premières → < 1775069491 | 1775069491 |
| Red Hat Quay 3.1 1775169155 | premières → < 1775169155 | 1775169155 |
| Red Hat Ansible Automation Platform 2 | Versions non publiées | |
| Red Hat Satellite 6 | Versions non publiées | |
| Lightspeed Core | Versions non publiées |
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| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Red Hat OpenShift AI (RHOAI) | Versions non publiées | |
| authlib 1.6 | premières → < 1.6.9 | 1.6.9 |
| Red Hat Quay 3.10 1775169155 | premières → < 1775169155 | 1775169155 |
Références
- github.com github.com
- github.com github.com
- github.com github.com
Chronologie
- Publiée
- Dernière modification