Inefficient regular expression complexity of lowercase() and uppercase() regex could lead to a denial of service attack. With a formed payload 'a' + 'a'.repeat(i) + 'A', only 32 characters payload could take 29443 ms time execution when testing lowercase(). The same issue happens with uppercase().
v1.5.1
huntr.dev report Regular Expression Denial of Service (ReDoS) and Catastrophic Backtracking
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{
"github_reviewed": true,
"nvd_published_at": "2022-08-02T20:15:00Z",
"github_reviewed_at": "2022-10-07T07:33:44Z",
"severity": "HIGH",
"cwe_ids": [
"CWE-1333",
"CWE-400"
]
}