CVE-2026-29086 — Hono: Cookie Attribute Injection via Unsanitized domain and path in setCookie()
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;), carriage …
Published: 2026-03-04 · CVSS: 5.4 · CVSS 3.1
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;), carriage returns (\r), or newline characters (\n) in the domain and path options when constructing the Set-Cookie header. Because cookie attributes are delimited by semicolons, this could allow injection of additional cookie attributes if untrusted input was passed into these fields. This issue has been patched in version 4.12.4.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7