cvedb.io
CVE-2026-47675
MEDIUM · CVSS 4.3
EPSS exploitation probability: 0%
Published 2026-05-28T17:16:32.537 · Last modified 2026-06-17T10:54:37.197

Summary

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.

Affected products

hono — hono

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.