CVE-2026-28490

Published: Mar 16, 2026 Last Modified: Mar 17, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,3
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM 6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: low
Availability: none

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0002
Percentile
0,0th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

203

Observable Discrepancy

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Access Control
Potential Impacts:
Read Application Data Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
View CWE Details
327

Use of a Broken or Risky Cryptographic Algorithm

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Accountability Non-Repudiation
Potential Impacts:
Read Application Data Modify Application Data Hide Activities
Applicable Platforms
Languages: Not Language-Specific, Verilog, VHDL
Technologies: ICS/OT, Not Technology-Specific
Likelihood of Exploit: High
View CWE Details
Application

Authlib by Authlib

Product Information
Vendor Authlib
Product Authlib
Version Range Affected
To 1.6.9 (exclusive)
cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/authlib/authlib/commit/48b345f29f6c459f1…
https://github.com/authlib/authlib/commit/48b345f29f6c459f11c6a40162b6c0b742ef2…
https://github.com/authlib/authlib/releases/tag/v1.6.9
https://github.com/authlib/authlib/releases/tag/v1.6.9
https://github.com/authlib/authlib/security/advisories/GHSA…
https://github.com/authlib/authlib/security/advisories/GHSA-7432-952r-cw78