CVE-2026-56762 Hono - Missing Cookie Name Validation in setCookie()

Hono before 4.12.12 does not validate cookie names on the write path in the setCookie, serialize, and serializeSigned functions, allowing invalid characters such as control characters e.g. \r or \n when an application passes a user-controlled cookie name. This can produce malformed Set-Cookie...

CVE-2026-56762 Hono - Missing Cookie Name Validation in setCookie()

Hono before 4.12.12 does not validate cookie names on the write path in the setCookie, serialize, and serializeSigned functions, allowing invalid characters such as control characters e.g. \r or \n when an application passes a user-controlled cookie name. This can produce malformed Set-Cookie...

EUVD-2026-38443

Hono before 4.12.12 does not validate cookie names on the write path in the setCookie, serialize, and serializeSigned functions, allowing invalid characters such as control characters e.g. \r or \n when an application passes a user-controlled cookie name. This can produce malformed Set-Cookie...

CVE-2026-54288

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, the Body Limit Middleware trusts the request's Content-Length header to decide whether a body is within the limit. On AWS Lambda API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge the body is...

CVE-2026-54290

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...

CVE-2026-54289

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda@Edge, CloudFront delivers a request header that appears more than once as several separate entries. The adapter writes each value with Headers.set instead of Headers.append, so...

CVE-2026-54287

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda, the ALB single-header response and the VPC Lattice v2 response join multiple Set-Cookie headers into one comma-separated value. Because commas also appear inside cookie attribute...

CVE-2026-54286

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on Windows hosts, an encoded backslash %5C in the request path decodes to , which the Windows path resolver treats as a separator. serve-static then resolves a single URL segment such as...

CVE-2026-54288

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, the Body Limit Middleware trusts the request's Content-Length header to decide whether a body is within the limit. On AWS Lambda API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge the body is...

CVE-2026-54288 Hono: Body Limit Middleware can be bypassed on AWS Lambda by understating `Content-Length`

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, the Body Limit Middleware trusts the request's Content-Length header to decide whether a body is within the limit. On AWS Lambda API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge the body is...

CVE-2026-54288 Hono: Body Limit Middleware can be bypassed on AWS Lambda by understating `Content-Length`

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, the Body Limit Middleware trusts the request's Content-Length header to decide whether a body is within the limit. On AWS Lambda API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge the body is...

CVE-2026-54288

The CVE-2026-54288 issue affects the Hono Web framework prior to version 4.12.25, where the Body Limit Middleware trusts the request Content-Length header. On AWS Lambda environments (API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge), the body is fully buffered and the adapter builds the requ...

CVE-2026-54289 Hono: Lambda@Edge adapter keeps only the last value of a repeated request header, dropping the rest

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda@Edge, CloudFront delivers a request header that appears more than once as several separate entries. The adapter writes each value with Headers.set instead of Headers.append, so...

CVE-2026-54289

CVE-2026-54289 — Hono Lambda@Edge header handling : On AWS Lambda@Edge, prior to 4.12.25, CloudFront may deliver repeated headers as multiple entries. The Hono Lambda@Edge adapter uses Headers.set for each value, overwriting the previous one, so only the last value reaches the application. Header...

CVE-2026-54289 Hono: Lambda@Edge adapter keeps only the last value of a repeated request header, dropping the rest

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on AWS Lambda@Edge, CloudFront delivers a request header that appears more than once as several separate entries. The adapter writes each value with Headers.set instead of Headers.append, so...

CVE-2026-54290

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...

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

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...

CVE-2026-54290

Hono (web framework) prior to 4.12.25 is vulnerable to a CORS misconfiguration: with credentials: true and no explicit origin (default wildcard), the CORS middleware reflects the request Origin and sets Access-Control-Allow-Credentials: true, allowing credentialed cross‑origin reads of cookie‑pro...

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

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...

CVE-2026-54286 Hono: Path traversal in `serve-static` on Windows via encoded backslash (`%5C`)

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on Windows hosts, an encoded backslash %5C in the request path decodes to , which the Windows path resolver treats as a separator. serve-static then resolves a single URL segment such as...