CVE-2026-81888
Published:August 31, 2026
Updated:September 24, 2026
@hono/oauth-providers is Authentication middleware for Hono. Prior to version 0.8.6, the built-in social login providers accept an OAuth callback even when the "state" value is absent on both sides, so the anti-CSRF check passes for a callback that never came from a genuine login attempt. This defeats the "state"-based CSRF protection under default usage. Version 0.8.6 has a patch.
Affected Packages
https://github.com/honojs/middleware.git (GITHUB):
Affected version(s) >=@hono/oauth-providers@0.1.0 <@hono/oauth-providers@0.8.6Fix Suggestion:
Update to version @hono/oauth-providers@0.8.6@hono/oauth-providers (NPM):
Affected version(s) >=0.1.0 <0.8.6Fix Suggestion:
Update to version 0.8.6Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.15