CVE-2026-81888: @hono/oauth-providers: OAuth state check fails open on omitted state, enabling login CSRF and forced account linking
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.
References
- github.com/advisories/GHSA-fm3f-ch8h-qw8q
- github.com/honojs/middleware/commit/b37765f40b7bddb1d8fce39573b085222dea58c1
- github.com/honojs/middleware/pull/2040
- github.com/honojs/middleware/releases/tag/%40hono%2Foauth-providers%400.8.6
- github.com/honojs/middleware/security/advisories/GHSA-fm3f-ch8h-qw8q
- nvd.nist.gov/vuln/detail/CVE-2026-81888
Code Behaviors & Features
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