{"id":"EUVD-2026-4774","revision":null,"records":[{"revision":"ba0d73141bd748a28a5b838aa721df01","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-24398","aliases":[],"title":"Hono's IPv4 address validation bypass in IP Restriction Middleware allows IP spoofing","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, IP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. The `IPV4_REGEX` pattern and `convertIPv4ToBinary` function in `src/utils/ipaddr.ts` do not properly validate that IPv4 octet values are within the valid range of 0-255, allowing attackers to craft malformed IP addresses that bypass IP-based access controls. 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Version 4.11.7 contains a patch for the issue.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","score":4.8,"severity":null}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh","https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37","https://github.com/honojs/hono/releases/tag/v4.11.7"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-4774","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jan 27, 2026, 7:06:42 PM","dateUpdated":"Jan 27, 2026, 7:20:35 PM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-0574","title":"IBM App Connect Enterprise: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2025-13490","CVE-2026-2327","CVE-2026-24398","CVE-2026-24472","CVE-2026-24473","CVE-2026-24771","CVE-2026-25536"]}],"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-2026-4774","identifiers":["EUVD-2026-4774","CVE-2026-24398","GHSA-r354-f388-2fhh"]},"retained":false,"historicalAffected":[]},{"revision":"60f108e25607474584ffe0d2b2b2f205","observedAt":"2026-10-25T06:17:10.452+00:00","statement":{"source":"nvd","id":"CVE-2026-24398","aliases":[],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, IP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. The `IPV4_REGEX` pattern and `convertIPv4ToBi…","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, IP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. The `IPV4_REGEX` pattern and `convertIPv4ToBinary` function in `src/utils/ipaddr.ts` do not properly validate that IPv4 octet values are within the valid range of 0-255, allowing attackers to craft malformed IP addresses that bypass IP-based access controls. Version 4.11.7 contains a patch for the issue.","state":0,"publishedAt":"2026-01-27T19:16:16.363+00:00","modifiedAt":"2026-06-17T10:23:00.35+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","score":4.8,"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:L/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37","https://github.com/honojs/hono/releases/tag/v4.11.7","https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-24398","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-185"],"productCriteria":["cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-01-27T19:16:16.363","lastModified":"2026-06-17T10:23:00.350"},"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-2026-24398","identifiers":["CVE-2026-24398"]},"retained":false,"historicalAffected":[]},{"revision":"77e42da2eed340be9fc60bd5572d0f89","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-r354-f388-2fhh","aliases":["CVE-2026-24398"],"title":"Hono IPv4 address validation bypass in IP Restriction Middleware allows IP spoofing","description":"## Summary\n\nIP Restriction Middleware in Hono is vulnerable to an IP address validation bypass. The `IPV4_REGEX` pattern and `convertIPv4ToBinary` function in `src/utils/ipaddr.ts` do not properly validate that IPv4 octet values are within the valid range of 0-255, allowing attackers to craft malformed IP addresses that bypass IP-based access controls.\n\n## Details\n\nThe vulnerability exists in two components:\n\n1. **Permissive regex pattern:** The `IPV4_REGEX (/^[0-9]{0,3}\\.[0-9]{0,3}\\.[0-9]{0,3}\\.[0-9]{0,3}$/)` accepts octet values greater than 255 (e.g., `999`).\n2. **Unsafe binary conversion:** The `convertIPv4ToBinary` function does not validate octet ranges before performing bitwise operations. When an octet exceeds 255, it overflows into adjacent octets during the bit-shift calculation.\n\nFor example, the IP address `1.2.2.355` is accepted and converts to the same binary value as 1.2.3.99:\n\n* `355` = `256 + 99` = `0x163`\n* After bit-shifting: `(1 << 24) + (2 << 16) + (2 << 8) + 355` = `0x01020363` = `1.2.3.99`\n\n## Impact\n\nAn attacker can bypass IP-based restrictions by crafting malformed IP addresses:\n\n* **Blocklist bypass:** If `1.2.3.0/24` is blocked, an attacker can use `1.2.2.355` (or similar) to bypass the restriction.\n* **Allowlist bypass:** Requests from unauthorized IP ranges may be incorrectly permitted.\n\nThis is exploitable when the application relies on client-provided IP addresses (e.g., `X-Forwarded-For header`) for access control decisions.\n\n## Affected Components\n\n* IP Restriction Middleware\n* `src/utils/ipaddr.ts`: `IPV4_REGEX`, `convertIPv4ToBinary`, `distinctRemoteAddr`","state":0,"publishedAt":"2026-01-27T19:01:43+00:00","modifiedAt":"2026-09-10T03:50:59.1194046+00:00","affected":[{"ecosystem":"npm","name":"hono","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.11.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-r354-f388-2fhh","https://nvd.nist.gov/vuln/detail/CVE-2026-24398","https://github.com/honojs/hono/commit/edbf6eea8e6c26a3937518d4ed91d8666edeec37","https://github.com/honojs/hono","https://github.com/honojs/hono/releases/tag/v4.11.7"],"sourceUrl":"https://github.com/advisories/GHSA-r354-f388-2fhh","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-r354-f388-2fhh","identifiers":["GHSA-r354-f388-2fhh","CVE-2026-24398"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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