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Medium · 6.5 CVE-2026-37737 EUVD-2026-34844GHSA-94jw-hqvj-vw74PYSEC-2026-3539

sanic-cors contains an improper regular expression in the try_match() function

Published Jun 5, 2026 · Updated Jun 5, 2026 · Assigned by mitre

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.

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI sanic-cors <= 2.2.0 — GHSA-94jw-hqvj-vw74

References