{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47675", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-19T21:10:38.798Z", "datePublished": "2026-05-28T15:28:23.458Z", "dateUpdated": "2026-05-28T19:17:17.728Z"}, "containers": {"cna": {"title": "Hono: Cookie helper does not sanitize sameSite and priority, allowing Set-Cookie injection", "problemTypes": [{"descriptions": [{"cweId": "CWE-113", "lang": "en", "description": "CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1287", "lang": "en", "description": "CWE-1287: Improper Validation of Specified Type of Input", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/honojs/hono/security/advisories/GHSA-3hrh-pfw6-9m5x", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/honojs/hono/security/advisories/GHSA-3hrh-pfw6-9m5x"}], "affected": [{"vendor": "honojs", "product": "hono", "versions": [{"version": "< 4.12.21", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-28T15:28:23.458Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-3hrh-pfw6-9m5x", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-28T19:16:42.834142Z", "id": "CVE-2026-47675", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T19:17:17.728Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-47675", "lastModified": "2026-05-28T17:16:32.537", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-28T17:16:32.537", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/security/advisories/GHSA-3hrh-pfw6-9m5x"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-113"}, {"lang": "en", "value": "CWE-1287"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-05-28T19:00:16.792027+00:00", "updated": "2026-05-28T19:00:16.792037+00:00", "vendors": []}