CVE-2026-81888
CVE-2026-81888 · @hono/oauth-providers: OAuth state check fails open on omitted state, enabling login CSRF and forced account linking
This page contains facts from public vulnerability sources. Check the original advisory before updating.
@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.
CVSS 5.4 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
@hono/oauth-providers
- Versions
- < 0.8.6: Affected
No fix published
@hono/oauth-providers npm
- Affected ranges
- SEMVER: < 0.8.6
Update to 0.8.6
Original sources
- https://github.com/honojs/middleware/security/advisories/GHSA-fm3f-ch8h-qw8q
- https://github.com/honojs/middleware/pull/2040
- https://github.com/honojs/middleware/commit/b37765f40b7bddb1d8fce39573b085222dea58c1
- https://github.com/honojs/middleware/releases/tag/%40hono%2Foauth-providers%400.8.6
- https://nvd.nist.gov/vuln/detail/CVE-2026-81888