CVE-2026-37737
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.
- Score
- CVSS 3.1 6.5 Medium
- Status
- Deferred - cve@mitre.org
- Published
- 2026-06-05
- Last modified
- 2026-06-05
- Weaknesses
- CWE-346, CWE-625
References
- https://github.com/ashleysommer/sanic-cors
- https://github.com/ashleysommer/sanic-cors/blob/master/sanic_cors/core.py
- https://github.com/npbhatter17/security-advisories/blob/main/CVE-2026-37737-sanic-cors-advisory.md
- https://pypi.org/project/Sanic-Cors/
