{"id":"CVE-2025-71399","summary":"Better Auth before 1.4.5 Path Normalization Bypass via rou3","details":"Better Auth relies on better-call, which uses the rou3 router library. In affected versions of rou3, paths are normalized by removing empty segments, so /path, //path, and ///path resolve to the same route. In Better Auth versions prior to 1.4.5 (which bundles the fixed rou3), this can allow attackers to bypass disabledPaths configuration and path-based rate limits by submitting requests with extra slashes in the URL path. The issue does not apply in deployments where the proxy or platform normalizes URLs by collapsing multiple slashes.","aliases":["GHSA-x732-6j76-qmhm"],"modified":"2026-09-18T03:30:38.140844565Z","published":"2026-08-02T12:15:22.129Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-20"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71399.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71399.json"},{"type":"ADVISORY","url":"https://github.com/better-auth/better-auth/security/advisories/GHSA-x732-6j76-qmhm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71399"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/better-auth-before-path-normalization-bypass-via-rou3"},{"type":"FIX","url":"https://github.com/better-auth/better-auth/commit/f60b43fa648399534507c9ac7db36d705b8874c3"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/better-auth/better-auth","events":[{"introduced":"0"},{"fixed":"2000fd63d072e51f653aec356afd3308bba7946b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.4.5"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.4.5-beta.1","v1.4.4-beta.3","v1.4.4-beta.1","v1.4.2-beta.5","v1.4.2-beta.4","v1.4.2-beta.3","v1.4.2-beta.2","v1.4.1-beta.1","v1.4.0-beta.27","v1.4.0-beta.26","v1.4.0-beta.25","v1.4.0-beta.24","v1.4.0-beta.23","v1.4.0-beta.22","v1.4.0-beta.21","v1.4.0-beta.20","v1.4.0-beta.19","v1.4.0-beta.18","v1.4.0-beta.17","v1.4.0-beta.16","v1.4.0-beta.15","v1.4.0-beta.14","v1.4.0-beta.13","v1.4.0-beta.12","v1.4.0-beta.11","v1.4.0-beta.10","v1.4.0-beta.9","v1.4.0-beta.8","v1.4.0-beta.7","v1.4.0-beta.6","v1.4.0-beta.5","v1.4.0-beta.4","v1.4.0-beta.3","v1.4.0-beta.2","v1.4.0-beta.1","v1.3.11","v1.3.10","v1.3.9","v1.3.8","v1.3.8-beta.1","v1.3.7-beta.3","v1.3.7-beta.2","v1.3.6","v1.3.5-beta.7","v1.3.5-beta.6","v1.3.5-beta.5","v1.3.5-beta.4","v1.3.5-beta.3","v1.3.5-beta.2","v1.3.5-beta.1","better-auth@1.3.4","@better-auth/stripe@1.3.4","@better-auth/sso@1.3.4","@better-auth/expo@1.3.4","@better-auth/cli@1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.1-beta.1","v1.3.0","v1.3.0-beta.11","v1.3.0-beta.10","v1.2.12","v1.2.11","v1.2.10","v1.2.10-beta.1","v1.2.9","v1.2.9-beta.10","v1.2.9-beta.9","feat/2867-oidcprovider-trusted","v1.2.9-beta.8","v1.2.9-beta.7","v1.2.9-beta.6","v1.2.9-beta.5","v1.2.8","v1.2.8-beta.8","v1.2.8-beta.7","v1.2.8-beta.6","v1.2.8-beta.4","v1.2.8-beta.3","v1.2.8-beta.2","v1.2.8-beta.1","v1.2.7","v1.2.7-beta.1","v1.2.6","v1.2.6-beta.13","v1.2.6-beta.12","v1.2.6-beta.11","v1.2.6-beta.10","v1.2.6-beta.9","v1.2.6-beta.8","v1.2.6-beta.7","v1.2.6-beta.6","v1.2.6-beta.5","v1.2.6-beta.4","v1.2.6-beta.3","v1.2.6-beta.2","v1.2.6-beta.1","v1.2.5","v1.2.5-beta.10","v1.2.5-beta.9","v1.2.5-beta.8","v1.2.5-beta.7","v1.2.5-beta.6","v1.2.5-beta.5","v1.2.5-beta.4","v1.2.5-beta.3","v1.2.5-beta.2","v1.2.5-beta.1","v1.2.4","v1.2.4-beta.12","v1.2.4-beta.10","v1.2.4-beta.9","v1.2.4-beta.8","v1.2.4-beta.7","v1.2.4-beta.6","v1.2.4-beta.5","v1.2.4-beta.4","v1.2.4-beta.3","v1.2.4-beta.2","v1.2.4-beta.1","v1.2.3","v1.2.3-beta.3","v1.2.3-beta.2","v1.2.3-beta.1","v1.2.2","v1.2.2-beta.6","v1.2.2-beta.5","v1.2.2-beta.4","v1.2.2-beta.3","v1.2.2-beta.2","v1.2.2-beta.1","v1.2.1","v1.2.1-beta.8","v1.2.1-beta.7","v1.2.1-beta.6","v1.2.1-beta.5","v1.2.1-beta.4","v1.2.1-beta.3","v1.2.1-beta.2","v1.2.1-beta.1","v1.2.0","v1.2.0-beta.19","v1.2.0-beta.18","v1.2.0-beta.17","v1.2.0-beta.16","v1.2.0-beta.15","v1.2.0-beta.14","v1.2.0-beta.13","v1.2.0-beta.12","v1.2.0-beta.11","v1.2.0-beta.10","v1.2.0-beta.9","v1.2.0-beta.8","v1.2.0-beta.7","v1.2.0-beta.6","v1.2.0-beta.5","v1.2.0-beta.4","v1.2.0-beta.3","v1.2.0-beta.2","v1.1.15-beta.6","v1.1.15-beta.5","v1.1.15-beta.4","v1.1.15-beta.3","v1.1.15-beta.2","v1.1.15-beta.1","v1.1.14","v1.1.14-beta.6","v1.1.14-beta.5","v1.1.14-beta.4","v1.1.14-beta.3","v1.1.14-beta.2","v1.1.14-beta.1","v1.1.13","v1.1.13-beta.3","v1.1.13-beta.2","v1.1.13-beta.1","v1.1.12","v1.1.12-beta.4","v1.1.12-beta.3","v1.1.12-beta.2","v1.1.11","v1.1.11-beta.1","v1.1.10","v1.1.10-beta.2","v1.1.10-beta.1","v1.1.9","v1.1.9-beta.1","v1.1.8","v1.1.8-beta.3","v1.1.8-beta.2","v1.1.8-beta.1","v1.1.7","v1.1.6","v1.1.5","v1.1.4","v1.1.4-beta.2","v1.1.4-beta.1","v1.1.3","v1.1.3-beta.6","v1.1.2","v1.1.2-beta.4","v1.1.2-beta.3","v1.1.2-beta.2","v1.1.2-beta.1","v1.1.1","v1.1.0","v1.0.23-beta.6","v1.0.23-beta.2","v1.0.22","v1.0.22-beta.4","v1.0.22-beta.3","v1.0.22-beta.2","v1.0.22-beta.1","v1.0.21","v1.0.20","v1.0.19","v1.0.18","v1.0.17","v1.0.16","v1.0.16-beta.2","v1.0.16-beta.1","v1.0.15","v1.0.14","v1.0.13","v1.0.12","v1.0.12-beta.3","v1.0.12-beta.2","v1.0.12-beta.1","v1.0.11","v1.0.11-beta.8","v1.0.11-beta.7","v1.0.11-beta.6","v1.0.11-beta.5","v1.0.11-beta.4","v1.0.11-beta.2","v1.0.10","v1.0.10-beta.3","v1.0.10-beta.2","v1.0.10-beta.1","v1.0.9","v1.0.9-beta.7","v1.0.9-beta.6","v1.0.9-beta.5","v1.0.9-beta.3","v1.0.9-beta.1","v1.0.8","v1.0.8-beta.4","v1.0.8-beta.2","v1.0.8-beta.1","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v0.8.9-beta.2","v0.8.8","v0.8.8-beta.2","v0.8.8-beta.1","v0.8.7-beta.5","v0.8.7-beta.3","v0.8.7-beta.2","v0.8.7-beta.1","v0.8.6-beta.6","v0.8.6-beta.3","v0.8.6-beta.2","v0.8.6-beta.1","v0.8.5","v0.8.5-beta.3","v0.8.5-beta.2","v0.8.5-beta.1","v0.8.4","v0.8.4-beta.7","v0.8.4-beta.6","v0.8.4-beta.5","v0.8.4-beta.4","v0.8.3-beta.6","v0.8.3-beta.5","v0.8.3-beta.4","v0.8.3-beta.3","v0.8.2","v0.8.2-beta.3","v0.8.2-beta.1","v0.8.1","v0.8.1-beta.5","v0.8.1-beta.4","v0.8.1-beta.3","v0.8.1-beta.2","v0.8.1-beta.1","v0.8.0","v0.7.6-beta.4","v0.7.6-beta.3","v0.7.6-beta.2","v0.7.6-beta.1","v0.7.5","v0.7.5-beta.9","v0.7.5-beta.8","v0.7.5-beta.7","v0.7.5-beta.6","v0.7.5-beta.5","v0.7.5-beta.4","v0.7.5-beta.3","v0.7.5-beta.2","v0.7.5-beta.1","v0.7.4","v0.7.3","v0.7.3-beta.11","v0.7.3-beta.9","v0.7.3-beta.8","v0.7.3-beta.7","v0.7.3-beta.6","v0.7.3-beta.5","v0.7.3-beta.4","v0.7.3-beta.3","v0.7.3-beta.2","v0.7.3-beta.1","v0.7.2","v0.7.2-beta.5","v0.7.2-beta.4","v0.7.1","v0.7.1-beta.6","v0.7.1-beta.4","v0.7.1-beta.3","v0.7.1-beta.1","v0.7.0","v0.7.0-beta.1","v0.6.3-beta.5","v0.6.2","v0.6.2-beta.8","v0.6.1","v0.6.1-beta.9","v0.6.1-beta.7","v0.6.1-beta.5","v0.6.1-beta.4","v0.6.1-beta.3","v0.6.1-beta.2","v0.6.1-beta.1","v0.6.0","v0.6.0-beta.1","v0.5.4-beta.6","v0.5.4-beta.5","v0.5.4-beta.4","v0.5.4-beta.3","v0.5.3","v0.5.3-beta.17","v0.5.3-beta.16","v0.5.3-beta.15","v0.5.3-beta.13","v0.5.3-beta.11","v0.5.3-beta.9","v0.5.3-beta.8","v0.5.3-beta.7","v0.5.3-beta.6","v0.5.3-beta.5","v0.5.3-beta.4","v0.5.3-beta.3","v0.5.3-beta.2","v0.5.3-beta.1","v0.5.2-beta.20","v0.5.2-beta.18","v0.5.2-beta.17","v0.5.2-beta.16","v0.5.2-beta.14","v0.5.2-beta.13","v0.5.2-beta.12","v0.5.2-beta.11","v0.5.2-beta.10","v0.5.2-beta.9","v0.5.2-beta.8","v0.5.2-beta.7","v0.5.2-beta.6","v0.5.2-beta.5","v0.5.2-beta.2","v0.5.1","v0.5.1-beta.6","v0.5.1-beta.5","v0.5.1-beta.4","v0.5.1-beta.3","v0.5.1-beta.2","v0.5.1-beta.1","v0.5.0","v0.4.14-beta.2","v0.4.14-beta.1","v0.4.13","v0.4.12","v0.4.12-beta.7","v0.4.12-beta.5","v0.4.12-beta.4","v0.4.12-beta.3","v0.4.12-beta.2","v0.4.12-beta.1","v0.4.11","v0.4.11-beta.3","v0.4.11-beta.2","v0.4.11-beta.1","v0.4.10","v0.4.10-beta.5","v0.4.10-beta.4","v0.4.9-beta.11","v0.4.9-beta.7","v0.4.9-beta.10","v0.4.9-beta.9","v0.4.9-beta.8","v0.4.9-beta.6","v0.4.9-beta.5","v0.4.9-beta.4","v0.4.9-beta.3","v0.4.9-beta.2","v0.4.9-beta.1","v0.4.8","v0.4.7","v0.4.7-beta.2","v0.4.7-beta.1","v0.4.5","v0.4.4","v0.4.4-beta.1","v0.4.3","v0.4.3-beta.1","v0.4.2","v0.4.1","v0.4.0","v0.3.6","v0.3.5","v0.3.5-beta.8","v0.3.5-beta.7","v0.3.5-beta.6","v0.3.5-beta.5","v0.3.5-beta.4","v0.3.5-beta.2","v0.3.5-beta.1","v0.3.4","v0.3.4-beta.6","v0.3.4-beta.2","v0.3.4-beta.1","v0.3.3","v0.3.3-beta.12","v0.3.3-beta.11","v0.3.3-beta.10","v0.3.3-beta.9","v0.3.3-beta.8","v0.3.3-beta.5","v0.3.3-beta.4","v0.3.3-beta.3","v0.3.3-beta.2","v0.3.3-beta.1","v0.3.2","v0.3.0","v0.2.11","v0.2.10","v0.2.9","v0.2.9-beta.9","v0.2.9-beta.8","v0.2.9-beta.7","v0.2.9-beta.6","v0.2.9-beta.5","v0.2.9-beta.4","v0.2.9-beta.2","v0.2.9-beta.1","v0.2.8","v0.2.8-beta.13","v0.2.8-beta.12","v0.2.8-beta.11","v0.2.8-beta.10","v0.2.8-beta.9","v0.2.8-beta.8","v0.2.8-beta.1","v0.2.6","v0.2.6-beta.10","v0.2.6-beta.9","v0.2.6-beta.8","v0.2.6-beta.7","v0.2.6-beta.6","v0.2.6-beta.5","v0.2.6-beta.4","v0.2.6-beta.3","v0.2.6-beta.1","v0.2.5","v0.2.5-beta.4","v0.2.5-beta.3","v0.2.5-beta.1","v0.2.3","v0.2.2","v0.2.1","v0.2.1-beta.1","v0.1.1-beta.6","v0.1.1-beta.5","v0.1.1-beta.4","v0.1.1-beta.2","v0.1.1-beta.1","v0.1.0","v0.0.10-beta.27","v0.0.10-beta.26","v0.0.10-beta.25","v0.0.10-beta.24","v0.0.10-beta.23","v0.0.10-beta.22","v0.0.10-beta.21","v0.0.10-beta.20","v0.0.10-beta.19","v0.0.10-beta.18","v0.0.10-beta.17","v0.0.10-beta.16","v0.0.10-beta.15","v0.0.10-beta.14","v0.0.10-beta.13","v0.0.10-beta.12","v0.0.10-beta.11","v0.0.10-beta.10","v0.0.10-beta.9","v0.0.10-beta.8","v0.0.10-beta.7","v0.0.10-beta.6","v0.0.10-beta.5","v0.0.10-beta.4","v0.0.10-beta.3","v0.0.10-beta.2","v0.0.10-beta.1","v0.0.9","v0.0.9-beta.38","v0.0.9-beta.37","v0.0.9-beta.36","v0.0.9-beta.35","v0.0.9-beta.34","v0.0.9-beta.33","v0.0.9-beta.32","v0.0.9-beta.31","v0.0.9-beta.30","v0.0.9-beta.29","v0.0.9-beta.28","v0.0.9-beta.27","v0.0.9-beta.26","v0.0.9-beta.25","v0.0.9-beta.24","v0.0.9-beta.23","v0.0.9-beta.22","v0.0.9-beta.21","v0.0.9-beta.20","v0.0.9-beta.19","v0.0.9-beta.18","v0.0.9-beta.17","v0.0.9-beta.16","v0.0.9-beta.15","v0.0.9-beta.14","v0.0.9-beta.13","v0.0.9-beta.12","v0.0.9-beta.11","v0.0.9-beta.10","v0.0.9-beta.9","v0.0.9-beta.8","v0.0.9-beta.7","v0.0.9-beta.6","v0.0.9-beta.5","v0.0.9-beta.4","v0.0.9-beta.3","v0.0.9-beta.2","v0.0.9-beta.1","v0.0.8","v0.0.8-beta.29","v0.0.8-beta.28","v0.0.8-beta.27","v0.0.8-beta.26","v0.0.8-beta.25","v0.0.8-beta.8","v0.0.8-beta.24","v0.0.8-beta.23","v0.0.8-beta.22","v0.0.8-beta.21","v0.0.8-beta.20","v0.0.8-beta.19","v0.0.8-beta.18","v0.0.8-beta.17","v0.0.8-beta.16","v0.0.8-beta.15","v0.0.8-beta.14","v0.0.8-beta.13","v0.0.8-beta.12","v0.0.8-beta.11","v0.0.8-beta.10","v0.0.8-beta.9","v0.0.8-beta.7","v0.0.8-beta.6","v0.0.8-beta.5","v0.0.8-beta.4","v0.0.8-beta.3","v0.0.8-beta.2","v0.0.8-beta.1","v0.0.7","v0.0.6","v0.0.5","v0.0.4","v0.0.3","v0.0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71399.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"}]}