Versions of base64-url before 2.0.0 are vulnerable to out-of-bounds read as it allocates uninitialized Buffers when number is passed in input.
Update to version 2.0.0 or later.
{
"cwe_ids": [
"CWE-125"
],
"github_reviewed": true,
"github_reviewed_at": "2019-05-31T23:45:33Z",
"nvd_published_at": null,
"severity": "HIGH"
}