The Windows implementation of this crate relied on the behavior of std::char::fromu32unchecked when its safety clause is violated. Even though this worked with Rust versions up to 1.42 (at least), that behavior could change with any new Rust version, possibly leading a security issue.
The flaw was corrected in version 2.0.0.
{
"nvd_published_at": "2020-12-31T10:15:00Z",
"severity": "HIGH",
"cwe_ids": [
"CWE-704"
],
"github_reviewed_at": "2021-08-19T21:08:17Z",
"github_reviewed": true
}