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.
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
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