CORS Middleware Vulnerability in Hono Web Application Framework
CVE-2026-54290

7.1HIGH

Key Information:

Vendor

Honojs

Status
Hono
Vendor
CVE Published:
22 June 2026

What is CVE-2026-54290?

The Hono Web Application Framework, prior to version 4.12.25, contains a vulnerability in its CORS Middleware. When configured with 'credentials: true' and without an explicit origin, the middleware reflects the request's Origin and sends an 'Access-Control-Allow-Credentials: true' header. This misconfiguration allows any site to perform credentialed cross-origin requests, which can lead to unauthorized access to cookie-authenticated endpoints. As a result, attackers can potentially read sensitive data or manipulate user sessions from arbitrary origins. This vulnerability is addressed in version 4.12.25.

Affected Version(s)

hono < 4.12.25

References

https://github.com/honojs/hono/security/advisories/GHSA-8...
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CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.