PT-2026-64139 · Pypi · Sanic-Cors

Published 2026-07-23 · Updated 2026-07-23

OSV

CVSS v3.1

6.5

Medium

Base vector

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

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.

Exploit

Fix

Related Identifiers

PYSEC-2026-3539

Affected Products

Sanic-Cors

References · 8

• 🔥 https://github.com/npbhatter17/security-advisories/blob/main/CVE-2026-37737-sanic-cors-advisory.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-37737 · Security Note
• https://osv.dev/vulnerability/PYSEC-2026-3539 · Vendor Advisory
• https://github.com/ashleysommer/sanic-cors/blob/master/sanic_cors/core.py · Note
• https://github.com/ashleysommer/sanic-cors · Note
• https://github.com/advisories/GHSA-94jw-hqvj-vw74 · Note
• https://pypi.org/project/Sanic-Cors · Note
• https://pypi.org/project/sanic-cors · Note