{"id":"CVE-2026-37737","aliases":["EUVD-2026-34844","GHSA-94jw-hqvj-vw74","PYSEC-2026-3539"],"status":"published","title":"sanic-cors contains an improper regular expression in the try_match() function","description":"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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00164,"percentile":0.05688,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-346","CWE-625"],"published":"2026-06-05T00:00:00Z","modified":"2026-10-28T02:31:08Z","affected":[{"source":"ghsa","ecosystem":"PyPI","package":"sanic-cors","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.2.0"}]}]},{"source":"osv","ecosystem":"PyPI","package":"sanic-cors","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.2.0"}]}],"versions":["0.10.0","0.10.0.post1","0.10.0.post2","0.10.0.post3","0.10.0b1","0.4.1","0.4.1.2","0.4.1.4","0.5.1.0","0.5.4.1","0.5.4.2","0.6.0.0","0.6.0.1","0.6.0.2","0.9.0","0.9.1","0.9.2","0.9.3","0.9.4","0.9.5","0.9.6","0.9.7","0.9.8","0.9.8.post1","0.9.8.post2","0.9.8.post3","0.9.9","0.9.9.post1","0.9.9.post2","0.9.9.post3","0.9.9.post4","1.0.0","1.0.1","2.0.0","2.0.1","2.1.0","2.2.0","2.2.0b1"]},{"source":"osv","ecosystem":"PyPI","package":"sanic-cors","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.2.0"}]}],"versions":["0.10.0","0.10.0.post1","0.10.0.post2","0.10.0.post3","0.10.0b1","0.4.1","0.4.1.2","0.4.1.4","0.5.1.0","0.5.4.1","0.5.4.2","0.6.0.0","0.6.0.1","0.6.0.2","0.9.0","0.9.1","0.9.2","0.9.3","0.9.4","0.9.5","0.9.6","0.9.7","0.9.8","0.9.8.post1","0.9.8.post2","0.9.8.post3","0.9.9","0.9.9.post1","0.9.9.post2","0.9.9.post3","0.9.9.post4","1.0.0","1.0.1","2.0.0","2.0.1","2.1.0","2.2.0","2.2.0b1"]}],"references":[{"url":"https://github.com/ashleysommer/sanic-cors/blob/master/sanic_cors/core.py","tags":["web"]},{"url":"https://github.com/ashleysommer/sanic-cors","tags":["package"]},{"url":"https://pypi.org/project/Sanic-Cors/","tags":["package"]},{"url":"https://github.com/npbhatter17/security-advisories/blob/main/CVE-2026-37737-sanic-cors-advisory.md","tags":["advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-37737","tags":["advisory"]},{"url":"https://pypi.org/project/Sanic-Cors","tags":["web"]},{"url":"https://github.com/advisories/GHSA-94jw-hqvj-vw74","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/37xxx/CVE-2026-37737.json","tags":["advisory"]},{"url":"https://pypi.org/project/sanic-cors","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-37737","description":"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.","status":"published","published":"2026-06-05T00:00:00Z","modified":"2026-06-05T20:15:39.697Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-625","CWE-346"],"updated_at":"2026-11-02T13:39:16.730222Z"}],"euvd":[{"id":"EUVD-2026-34844","description":"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.","status":"published","published":"2026-06-05T00:00:00Z","modified":"2026-06-05T20:15:39Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:50.521592Z"}],"ghsa":[{"id":"GHSA-94jw-hqvj-vw74","title":"sanic-cors contains an improper regular expression in the try_match() function","description":"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.","status":"published","published":"2026-06-05T15:32:25Z","modified":"2026-07-17T17:05:31Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:40:46.257074Z"}],"nvd":[{"id":"CVE-2026-37737","description":"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.","status":"published","published":"2026-06-05T15:16:51.72Z","modified":"2026-06-17T10:41:38.747Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-346","CWE-625"],"updated_at":"2026-11-02T14:12:22.371367Z"}],"osv":[{"id":"CVE-2026-37737","description":"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.","status":"published","published":"2026-06-05T00:00:00Z","modified":"2026-10-28T02:31:08.226569201Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:03.040464Z"},{"id":"GHSA-94jw-hqvj-vw74","title":"sanic-cors contains an improper regular expression in the try_match() function","description":"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.","status":"published","published":"2026-06-05T15:32:25Z","modified":"2026-07-23T15:11:37.86212001Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T15:46:43.123867Z"},{"id":"PYSEC-2026-3539","title":"sanic-cors contains an improper regular expression in the try_match() function","description":"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.","status":"published","published":"2026-07-23T11:41:39.408627Z","modified":"2026-07-23T15:00:23.754390138Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:56.847083Z"}]}}