CVE-2026-81888
@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.
- Published Aug 31, 2026
- CVSS 5.4 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available