CVE-2026-37737

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-37737
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-05 15:16:51 UTC
Updated2026-06-05 21:16:30 UTC
Descriptionsanic-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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

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

EPSS: 0.000170000 probability, percentile 0.041620000 (date 2026-06-11)

Problem Types: CWE-346 | CWE-625 | n/a | CWE-625 CWE-625 Permissive Regular Expression | CWE-346 CWE-346 Origin Validation Error

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
pypi.org/project/Sanic-Cors [email protected] pypi.org
github.com/ashleysommer/sanic-cors [email protected] github.com
github.com/ashleysommer/sanic-cors/blob/master/sanic_cors/core.py [email protected] github.com
github.com/npbhatter17/security-advisories/blob/main/CVE-2026-37737-sani... [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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