CVE-2026-37737

CVSS 6.5 MEDIUMEPSS 0.2%CWE-346 CWE-625

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

05 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

n/a · n/a

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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/