CVE-2026-28490

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a cryptographic padding oracle vulnerability was identified in the Authlib Python library concerning the implementation of the JSON Web Encryption (JWE) RSA1_5 key management algorithm. Authlib registers RSA1_5 in its default algorithm registry without requiring explicit opt-in, and actively destroys the constant-time Bleichenbacher mitigation that the underlying cryptography library implements correctly. This issue has been patched in version 1.6.9.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Weakness enumeration

CWE-203 CWE-327

Affected software

Vendor	Product	Versions
authlib	authlib	< 1.6.9

References

https://github.com/authlib/authlib/commit/48b345f29f6c459f11c6a40162b6c0b742ef2e22Patch
https://github.com/authlib/authlib/releases/tag/v1.6.9Product, Release Notes
https://github.com/authlib/authlib/security/advisories/GHSA-7432-952r-cw78Exploit, Mitigation, Vendor Advisory

Timeline

Published: Mar 16, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-284926.5File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit CVE-2026-284936.5ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16, an integer overfl CVE-2026-284947.1ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16 and 6.9.13-41, a s CVE-2026-284958.8GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated CVE-2026-284969.4FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 have a Server-Side Template Injection (SSTI CVE-2026-284979.1TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Prior to version 2.03, an integer overflow vulnerability in the string-to CVE-2026-284987.5Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a library-level vulnerability was identif CVE-2026-284996.1LeafKit is a templating language with Swift-inspired syntax. Prior to version 1.14.2, HTML escaping doesn't work correctly when a template p CVE-2026-28506.5A vulnerability was found in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. This affects the function addCustomer/updateCu CVE-2026-285009.1Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. In versions up to and including 1.20.1, a sec CVE-2026-285019.8WWBN AVideo is an open source video platform. Prior to version 24.0, an unauthenticated SQL Injection vulnerability exists in AVideo within CVE-2026-285028.8WWBN AVideo is an open source video platform. Prior to version 24.0, an authenticated Remote Code Execution (RCE) vulnerability was identifi