CVE-2026-54290 – Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

CVE ID :CVE-2026-54290

Published : June 22, 2026, 5:15 p.m. | 28 minutes ago

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.

Severity: 0.0 | NA

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