NPM: hono/jsx does not isolate context per request, leading to cross-request data disclosure

NPM: hono/jsx does not isolate context per request, leading to cross-request data disclosure vulnerability discovered by ? in WordPress Npm hono versions = 4.11.8, 4.12.27...

Hono: Server-Side XSS via JSX Escaping Bypass in cx() Utility

Summary cx in hono/css composes class names from plain strings but marks the result as already-escaped without HTML-escaping the input. When the result is used as a JSX class attribute during server-side rendering, the value is written into the attribute unescaped, so untrusted input can break ou...

GHSA-3HRH-PFW6-9M5X Hono: Cookie helper does not sanitize sameSite and priority, allowing Set-Cookie injection

Summary The serialize function in hono/cookie validates domain and path options against characters that corrupt Set-Cookie header syntax ;, \r, \n, but does not apply the same validation to sameSite and priority. An application that passes user-controlled input into either option may produce a...

Incorrect Regular Expression

Overview hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to Incorrect Regular Expression via the ip-restriction middleware. An attacker can bypass configured deny rules for IPv6 addresses by submitting non-canonical representations, such as...

NPM: Hono has improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()

NPM: Hono has improper validation of NumericDate claims exp, nbf, iat in JWT verify vulnerability discovered by ? in WordPress Npm hono versions 4.12.18...

GHSA-26PP-8WGV-HJVM Hono missing validation of cookie name on write path in setCookie()

Summary Cookie names are not validated on the write path when using setCookie, serialize, or serializeSigned to generate Set-Cookie headers. While certain cookie attributes such as domain and path are validated, the cookie name itself may contain invalid characters. This results in inconsistent...

EUVD-2026-4752

Hono vulnerable to XSS through ErrorBoundary component...

GHSA-9R54-Q6CX-XMH5 Hono vulnerable to XSS through ErrorBoundary component

Summary A Cross-Site Scripting XSS vulnerability exists in the ErrorBoundary component of the hono/jsx library. Under certain usage patterns, untrusted user-controlled strings may be rendered as raw HTML, allowing arbitrary script execution in the victim's browser. Details The issue is in the...

Hono vulnerable to XSS through ErrorBoundary component

Summary A Cross-Site Scripting XSS vulnerability exists in the ErrorBoundary component of the hono/jsx library. Under certain usage patterns, untrusted user-controlled strings may be rendered as raw HTML, allowing arbitrary script execution in the victim's browser. Details The issue is in the...

CVE-2026-24771

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, a Cross-Site Scripting XSS vulnerability exists in the ErrorBoundary component of the hono/jsx library. Under certain usage patterns, untrusted user-controlled strings may be rendered as...