{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-37737", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-06-05T13:56:15.693Z", "dateReserved": "2026-04-06T00:00:00.000Z", "datePublished": "2026-06-05T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-06-05T13:56:15.693Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/ashleysommer/sanic-cors/blob/master/sanic_cors/core.py"}, {"url": "https://github.com/ashleysommer/sanic-cors"}, {"url": "https://pypi.org/project/Sanic-Cors/"}, {"url": "https://github.com/npbhatter17/security-advisories/blob/main/CVE-2026-37737-sanic-cors-advisory.md"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-37737", "lastModified": "2026-06-05T15:16:51.720", "metrics": {}, "published": "2026-06-05T15:16:51.720", "references": [{"source": "cve@mitre.org", "url": "https://github.com/ashleysommer/sanic-cors"}, {"source": "cve@mitre.org", "url": "https://github.com/ashleysommer/sanic-cors/blob/master/sanic_cors/core.py"}, {"source": "cve@mitre.org", "url": "https://github.com/npbhatter17/security-advisories/blob/main/CVE-2026-37737-sanic-cors-advisory.md"}, {"source": "cve@mitre.org", "url": "https://pypi.org/project/Sanic-Cors/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received"}

{}

{"created": "2026-06-05T15:30:13.918642+00:00", "title": "CORS Allowlist Bypass in Sanic\u2011Cors due to Improper Regex", "updated": "2026-06-05T15:30:13.918655+00:00", "vendors": [], "weaknesses": ["CWE-285"]}