{"id":"CVE-2026-81888","sourceIdentifier":"security-advisories@github.com","published":"2026-08-31T21:17:52.317","lastModified":"2026-09-09T21:09:13.080","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"@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":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"honojs","product":"@hono/oauth-providers","versions":[{"version":"< 0.8.6","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-01T14:15:08.751502Z","id":"CVE-2026-81888","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-352"},{"lang":"en","value":"CWE-1275"}]}],"references":[{"url":"https://github.com/honojs/middleware/commit/b37765f40b7bddb1d8fce39573b085222dea58c1","source":"security-advisories@github.com"},{"url":"https://github.com/honojs/middleware/pull/2040","source":"security-advisories@github.com"},{"url":"https://github.com/honojs/middleware/releases/tag/%40hono%2Foauth-providers%400.8.6","source":"security-advisories@github.com"},{"url":"https://github.com/honojs/middleware/security/advisories/GHSA-fm3f-ch8h-qw8q","source":"security-advisories@github.com"}]}