What’s Vulnerable › Vulnerabilities

CVE-2026-37737

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-05 · updated 2026-06-17
• Weakness: CWE-346

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.

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/

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