CVE-2026-54290CWE-942

Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

High · published June 22, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
24.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00328 · 24.7th percentile
Weakness
CWE-942 · Permissive Cross-domain Security Policy with Untrusted Domains
Published
2026-06-22T17:15Z
EPSS history
Timeline
  • 22 JUN 17:15Z
    Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard
    cvelistv5