GHSA-3q45-2fh7-66cj
Suggest an improvement- Source
- https://github.com/advisories/GHSA-3q45-2fh7-66cj
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-3q45-2fh7-66cj/GHSA-3q45-2fh7-66cj.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-3q45-2fh7-66cj
- Withdrawn
- 2026-09-01T18:56:01Z
- Published
- 2026-08-02T15:30:21Z
- Modified
- 2026-09-01T19:02:53Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- Duplicate Advisory: better-auth has an external request basePath modification DoS
- Details
-
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-569q-mpph-wgww. This link is maintained to preserve external references.
Original Description
better-auth (npm) before 1.4.2 allows an external request to configure baseURL when it is not otherwise defined (e.g., BETTER_AUTH_URL is unset). An attacker able to make the very first request to the server after startup can poison the router's base path, causing all routes to return 404 for all users (denial of service). The issue is not reachable when baseURL is explicitly configured or on typical managed hosting platforms.
- Database specific
{ "cwe_ids": [ "CWE-770" ], "github_reviewed": true, "github_reviewed_at": "2026-09-01T18:56:01Z", "nvd_published_at": "2026-08-02T13:16:52Z", "severity": "CRITICAL" }- References
Affected packages
npm / better-auth
Package
- Name
- better-auth
- View open source insights on deps.dev
- Purl
- pkg:npm/better-auth