{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-29045", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-03T17:50:11.243Z", "datePublished": "2026-03-04T22:09:22.045Z", "dateUpdated": "2026-03-04T22:09:22.045Z"}, "containers": {"cna": {"title": "Hono: Arbitrary file access via serveStatic vulnerability", "problemTypes": [{"descriptions": [{"cweId": "CWE-177", "lang": "en", "description": "CWE-177: Improper Handling of URL Encoding (Hex Encoding)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr"}, {"name": "https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3", "tags": ["x_refsource_MISC"], "url": "https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3"}], "affected": [{"vendor": "honojs", "product": "hono", "versions": [{"version": "< 4.12.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-04T22:09:22.045Z"}, "descriptions": [{"lang": "en", "value": "Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4."}], "source": {"advisory": "GHSA-q5qw-h33p-qvwr", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4."}], "id": "CVE-2026-29045", "lastModified": "2026-03-04T23:16:10.247", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-04T23:16:10.247", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3"}, {"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-177"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.12.4)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "matching", "scores": [{"score": 90.0, "source": "matching"}]}, "original": {"product": "hono", "source": "cna", "vendor": "honojs"}, "product": "hono", "vendor": "hono"}], "created": "2026-03-05T09:05:36.392980+00:00", "updated": "2026-03-05T09:05:36.393056+00:00", "vendors": ["hono", "hono$PRODUCT$hono"]}