CVE-2026-69207

Hono’s built-in CORS middleware (hono/cors) is vulnerable to a ReDoS in the Access-Control-Request-Headers parsing during preflight requests when allowHeaders is unset/empty. The regex-based parser can backtrack quadratically with long whitespace, potentially causing seconds of CPU usage per pref...

CVE-2026-71850

Hono CVE-2026-71850 affects the Hono Web framework (3.8.0–4.12.33). memo() retains SSR output for later renders and reuses it when controls with identical props are rendered, while request-scoped values read during rendering (e.g., JSX Context via createContext/useContext, useRequestContext from ...

EUVD-2026-54578

Hono is a Web application framework that provides support for any JavaScript runtime. From 4.12.0 to 4.12.33, the languageDetector middleware is vulnerable to algorithmic complexity denial of service when processing a crafted language tag containing a large number of hyphen separated subtags. To...

NPM: Hono: ReDoS in CORS middleware via Access-Control-Request-Headers

NPM: Hono: ReDoS in CORS middleware via Access-Control-Request-Headers vulnerability discovered by ? in WordPress Npm hono versions 4.12.34...