An issue was discovered in webargs before 5.1.3, as used with marshmallow and other products. JSON parsing uses a short-lived cache to store the parsed JSON body. This cache is not thread-safe, meaning that incorrect JSON payloads could have been parsed for concurrent requests.
{
"nvd_published_at": null,
"cwe_ids": [
"CWE-362"
],
"severity": "HIGH",
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:24:21Z"
}