CVE•Published 2026-05-28•Modified 2026-05-29•0 articles on news•6 live references•NVD data

CVE-2026-47675Hono · Hono

Vulnerability data via NVD (ingested)

CVSS v3.1

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS percentile

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Weaknesses (CWE)

CWE-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')CWE-1287Improper Validation of Specified Type of Input

Description

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

Published 2026-05-28

Modified 2026-05-29

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-47675

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Hono Hono"

All exposed Hono Hono instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Hono"

HTTP body or banner mentions "Hono" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-47675