ZeroDay Findings
Sign inSign up

Findings

CVE-2026-47675

Hono is a Web application framework that provides support for any JavaScript runtime.

Published May 28, 2026 · updated Oct 14, 2026 · hono hono

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, 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 Set-Cookie response header containing attacker-chosen additional attributes. This vulnerability is fixed in 4.12.21.

Timeline

Detection, updates, and resolution for this record.

  1. May 28, 2026 · NIST NVD

    Detected

    Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, 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 Set-C

  2. Oct 14, 2026 · NIST NVD

    Updated

    Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, 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 Set-C

Affected

  • cpe hono/honoversion unspecified

Sources

  • CVE.orgCVE-2026-47675

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2026-47675

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDCVE-2026-47675

    Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, 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 vali

    nvd.nist.gov

References