GHSA-94JW-HQVJ-VW74
Vulnerability from github – Published: 2026-06-05 15:32 – Updated: 2026-07-17 17:05sanic-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": [
{
"package": {
"ecosystem": "PyPI",
"name": "sanic-cors"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "2.2.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-37737"
],
"database_specific": {
"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"
},
"details": "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": "GHSA-94jw-hqvj-vw74",
"modified": "2026-07-17T17:05:30Z",
"published": "2026-06-05T15:32:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-37737"
},
{
"type": "PACKAGE",
"url": "https://github.com/ashleysommer/sanic-cors"
},
{
"type": "WEB",
"url": "https://github.com/ashleysommer/sanic-cors/blob/master/sanic_cors/core.py"
},
{
"type": "WEB",
"url": "https://github.com/npbhatter17/security-advisories/blob/main/CVE-2026-37737-sanic-cors-advisory.md"
},
{
"type": "WEB",
"url": "https://pypi.org/project/Sanic-Cors"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "sanic-cors contains an improper regular expression in the try_match() function"
}
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