CVE-2026-28490 - Authlib Vulnerable to JWE RSA1_5 Bleichenbacher Padding Oracle

CVE-2026-28490 - Authlib Vulnerable to JWE RSA1_5 Bleichenbacher Padding Oracle

https://cvefeed.io/rssfeed/latest.atom / Mon, 03/16/2026 - 20:07
CVE ID :CVE-2026-28490
Published : March 16, 2026, 6:16 p.m. | 14 minutes ago
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.
Severity: 8.3 | HIGH
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