{"id":"EUVD-2026-20497","revision":null,"records":[{"revision":"31200a32835241ad891175244a27e659","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-39409","aliases":[],"title":"Hono has incorrect IP matching in ipRestriction() for IPv4-mapped IPv6 addresses","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules. In environments such as Node.js dual-stack, this can cause IPv4 rules to fail to match, leading to unintended authorization behavior. This vulnerability is fixed in 4.12.12.","state":0,"publishedAt":"2026-04-08T14:43:36.476+00:00","modifiedAt":"2026-04-08T16:13:05.175+00:00","affected":[{"ecosystem":"Vendor product","name":"hono","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"honojs\",\n                    \"product\": \"hono\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.12.12\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-xpcf-pg52-r92g","https://github.com/honojs/hono/commit/48fa2233bc092f650119f42df043050737cabf39","https://github.com/honojs/hono/releases/tag/v4.12.12"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-39409","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-39409","identifiers":["CVE-2026-39409"]},"retained":false,"historicalAffected":[]},{"revision":"9b89f4c2c31b450bb6165809feffad4b","observedAt":"2026-11-15T11:06:14.392+00:00","statement":{"source":"euvd","id":"EUVD-2026-20497","aliases":["CVE-2026-39409","GHSA-xpcf-pg52-r92g"],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules…","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules. In environments such as Node.js dual-stack, this can cause IPv4 rules to fail to match, leading to unintended authorization behavior. This vulnerability is fixed in 4.12.12.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.3,"severity":null}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-xpcf-pg52-r92g","https://github.com/honojs/hono/commit/48fa2233bc092f650119f42df043050737cabf39","https://github.com/honojs/hono/releases/tag/v4.12.12"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-20497","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 8, 2026, 2:43:36 PM","dateUpdated":"Apr 8, 2026, 4:13:05 PM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-1407","title":"IBM App Connect Enterprise Certified Container: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2026-26013","CVE-2026-27142","CVE-2026-28277","CVE-2026-28684","CVE-2026-32288","CVE-2026-33151","CVE-2026-33349","CVE-2026-33532","CVE-2026-33891","CVE-2026-33894","CVE-2026-33895","CVE-2026-33896","CVE-2026-33916","CVE-2026-34601","CVE-2026-35469","CVE-2026-39406","CVE-2026-39407","CVE-2026-39408","CVE-2026-39409","CVE-2026-39410","CVE-2026-39983","CVE-2026-40175","CVE-2026-40347","CVE-2026-40895","CVE-2026-41238","CVE-2026-41239","CVE-2026-41240","CVE-2026-4923","CVE-2026-4926"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-20497","identifiers":["EUVD-2026-20497","CVE-2026-39409","GHSA-xpcf-pg52-r92g"]},"retained":false,"historicalAffected":[]},{"revision":"fd8861487fa3456eaab6592d9cfecf38","observedAt":"2026-10-25T09:17:18.747+00:00","statement":{"source":"nvd","id":"CVE-2026-39409","aliases":[],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules…","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, ipRestriction() does not canonicalize IPv4-mapped IPv6 client addresses (e.g. ::ffff:127.0.0.1) before applying IPv4 allow or deny rules. In environments such as Node.js dual-stack, this can cause IPv4 rules to fail to match, leading to unintended authorization behavior. This vulnerability is fixed in 4.12.12.","state":0,"publishedAt":"2026-04-08T15:16:14.99+00:00","modifiedAt":"2026-07-24T21:10:00.143+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/commit/48fa2233bc092f650119f42df043050737cabf39","https://github.com/honojs/hono/releases/tag/v4.12.12","https://github.com/honojs/hono/security/advisories/GHSA-xpcf-pg52-r92g"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-39409","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-180"],"productCriteria":["cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-04-08T15:16:14.990","lastModified":"2026-07-24T21:10:00.143"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-39409","identifiers":["CVE-2026-39409"]},"retained":false,"historicalAffected":[]},{"revision":"090847fc4a254a788f6b1e89cb9cd586","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-xpcf-pg52-r92g","aliases":["CVE-2026-39409"],"title":"Hono has incorrect IP matching in ipRestriction() for IPv4-mapped IPv6 addresses","description":"## Summary\n\n`ipRestriction()` does not canonicalize IPv4-mapped IPv6 client addresses (e.g. `::ffff:127.0.0.1`) before applying IPv4 allow or deny rules. In environments such as Node.js dual-stack, this can cause IPv4 rules to fail to match, leading to unintended authorization behavior.\n\n## Details\n\nThe middleware classifies client addresses based on their textual form. Addresses containing \"`:`\" are treated as IPv6, including IPv4-mapped IPv6 addresses such as `::ffff:127.0.0.1`. These addresses are not normalized to IPv4 before matching.\n\nAs a result:\n\n* IPv4 static rules (e.g. `127.0.0.1`) do not match because the raw string differs\n* IPv4 CIDR rules (e.g. `127.0.0.0/8`, `10.0.0.0/8`) are skipped because the address is treated as IPv6\n\nFor example, with:\n\n`denyList: ['127.0.0.1']`\n\na request from `127.0.0.1` may be represented as `::ffff:127.0.0.1` and bypass the deny rule.\n\nThis behavior commonly occurs in Node.js environments where IPv4 clients are exposed as IPv4-mapped IPv6 addresses.\n\n## Impact\n\nApplications that rely on IPv4-based `ipRestriction()` rules may incorrectly allow or deny requests.\n\nIn affected deployments, a denied IPv4 client may bypass access restrictions. Conversely, legitimate clients may be rejected when using IPv4 allow lists.","state":0,"publishedAt":"2026-04-08T00:17:14+00:00","modifiedAt":"2026-09-10T03:50:44.8981811+00:00","affected":[{"ecosystem":"npm","name":"hono","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.12.12"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":null,"severity":null},{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-xpcf-pg52-r92g","https://nvd.nist.gov/vuln/detail/CVE-2026-39409","https://github.com/honojs/hono/commit/48fa2233bc092f650119f42df043050737cabf39","https://github.com/honojs/hono","https://github.com/honojs/hono/releases/tag/v4.12.12"],"sourceUrl":"https://github.com/advisories/GHSA-xpcf-pg52-r92g","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-xpcf-pg52-r92g","identifiers":["GHSA-xpcf-pg52-r92g","CVE-2026-39409"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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