CVE-2026-54290
High
Description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with credentials: true and no explicit origin (the default wildcard), the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Credentials: true. Any site can then make credentialed cross-origin requests and read the responses, exposing cookie-authenticated endpoints to arbitrary origins. This vulnerability is fixed in 4.12.25.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Hono
PublishedJun 22, 2026
First seenJun 22, 2026
Weakness typeCWE-942CWE-942
How to fix
Update
- hono4.12.25 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| hononpm | v < 4.12.25 | 4.12.25 |
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