CVE-2025-48370: auth-js Vulnerable to Insecure Path Routing from Malformed User Input

May 27, 2025 (updated October 31, 2025)

The library functions getUserById, deleteUser, updateUserById, listFactors and deleteFactor did not require the user supplied values to be valid UUIDs. This could lead to a URL path traversal, resulting in the wrong API function being called.

Implementations that follow security best practice and validate user controlled inputs, such as the userId are not affected by this.

References

github.com/advisories/GHSA-8r88-6cj9-9fh5
github.com/supabase/auth-js
github.com/supabase/auth-js/commit/1bcb76e479e51cd9bca2d7732d0bf3199e07a693
github.com/supabase/auth-js/pull/1063
github.com/supabase/auth-js/security/advisories/GHSA-8r88-6cj9-9fh5
nvd.nist.gov/vuln/detail/CVE-2025-48370

Code Behaviors & Features

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