{"action":"Upgrade better-auth to 1.6.2 or later.","affected":[{"fixed":"1.6.2","introduced":"0"}],"component":"better-auth","cve_ids":["CVE-2026-67335"],"ecosystem":"npm","epss":0.00283,"exploited":false,"fixed_versions":["1.6.2"],"ghsa_id":"GHSA-wxw3-q3m9-c3jr","id":"tcs_01M5KGGDNVCENQMS6WM9PYSDGE","modified_at":"2026-08-02T03:56:45.903621172Z","published_at":"2026-05-15T17:33:40Z","references":["https://osv.dev/vulnerability/GHSA-wxw3-q3m9-c3jr","https://github.com/better-auth/better-auth/security/advisories/GHSA-wxw3-q3m9-c3jr","https://github.com/better-auth/better-auth/issues/8897","https://github.com/better-auth/better-auth/pull/8949","https://github.com/better-auth/better-auth/commit/9deb7936aba7931f2db4b460141f476508f11bfd","https://github.com/better-auth/better-auth"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-wxw3-q3m9-c3jr","url":"https://osv.dev/vulnerability/GHSA-wxw3-q3m9-c3jr"}],"summary":"Better Auth: OAuth callback accepts mismatched `state` when cookie-backed state storage is used without PKCE"}