The npm hbs package is an Express view engine wrapper for Handlebars. Depending on usage, users of hbs may be vulnerable to a file disclosure vulnerability. There is currently no patch for this vulnerability. hbs mixes pure template data with engine configuration options through the Express render API. By overwriting internal configuration options a file disclosure vulnerability may be triggered in downstream applications. For an example PoC see the referenced GHSL-2021-020.
{
"github_reviewed_at": "2021-08-26T17:12:06Z",
"github_reviewed": true,
"cwe_ids": [
"CWE-200",
"CWE-538",
"CWE-94"
],
"nvd_published_at": "2021-08-16T19:15:00Z",
"severity": "MODERATE"
}