CVE-2026-37737 | THREATINT

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.

PUBLISHED Reserved 2026-04-06 | Published 2026-06-05 | Updated 2026-06-05 | Assigner mitre

References

github.com/...mmer/sanic-cors/blob/master/sanic_cors/core.py

github.com/ashleysommer/sanic-cors

pypi.org/project/Sanic-Cors/

github.com/...lob/main/CVE-2026-37737-sanic-cors-advisory.md

cve.org (CVE-2026-37737)

nvd.nist.gov (CVE-2026-37737)

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