CVE-2026-37737

June 5, 2026, 9:16 p.m.

6.5
Medium

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.

Product(s) Impacted

Vendor Product Versions
Sanic-cors
  • Sanic-cors
  • <2.2.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-346
Origin Validation Error
The product does not properly verify that the source of data or communication is valid.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a sanic-cors sanic-cors <2.2.0 / / / / / /

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/

Tags

[email protected]
CWE-346
2026-06-05
CVE-2026-37737

CVSS Score

6.5 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: NONE
  • Availability Impact: NONE

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

    View Vector String

Timeline

Published: June 5, 2026, 3:16 p.m.
Last Modified: June 5, 2026, 9:16 p.m.

Status : Deferred

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.