CVE-2026-37737

FAUCET Score

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.

First published: Jun 5, 2026Last modified: Jun 5, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
N/A	N/A	n/aCNA affected

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.16%

Probability of exploitation in next 30 days

EPSS Percentile

6.0%

Percentile rank of EPSS score among Peer Group

As of 2026-07-26

Model: v2026.06.15

This CVE's current EPSS score of 0.0016 is in the 5th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

pipGHSA-94jw-hqvj-vw74medium

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

Jun 5, 2026

References

github.com / ashleysommer/sanic-cors

github.com / ashleysommer/sanic-cors/blob/master/sanic_cors/core.py

github.com / npbhatter17/security-advisories/blob/main/CVE-2026-37737-sanic-cors-advisory.md

pypi.org / project/Sanic-Cors