sanic-cors version 2.2.0 and prior contains an improper regular expression in the try_match() function in sanic_cors/core.py that uses re.match without end-anchoring. This allows an attacker to bypass CORS origin allowlists by registering a domain that begins with a trusted origin string, to gain unauthorized access to cross-origin requests for authenticated resources.
{
"cwe_ids": [
"CWE-346"
],
"github_reviewed": true,
"github_reviewed_at": "2026-07-17T17:05:30Z",
"nvd_published_at": "2026-06-05T15:16:51Z",
"severity": "MODERATE"
}