CVE-2026-126359

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-126359", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-11-10T21:12:01.228Z", "datePublished": "2026-11-12T22:22:32.161Z", "dateUpdated": "2026-11-12T22:22:32.161Z"}, "containers": {"cna": {"title": "Hono: `css` helper does not escape a closing tag split between the template and an interpolated value, allowing HTML injection", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.4, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/honojs/hono/security/advisories/GHSA-3gg2-335m-rxc6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/honojs/hono/security/advisories/GHSA-3gg2-335m-rxc6"}, {"name": "https://github.com/honojs/hono/commit/15bbd96ad1b62a0b189db4fd8dc7bf8ef280c513", "tags": ["x_refsource_MISC"], "url": "https://github.com/honojs/hono/commit/15bbd96ad1b62a0b189db4fd8dc7bf8ef280c513"}, {"name": "https://github.com/honojs/hono/releases/tag/v4.13.16", "tags": ["x_refsource_MISC"], "url": "https://github.com/honojs/hono/releases/tag/v4.13.16"}], "affected": [{"vendor": "honojs", "product": "hono", "versions": [{"version": ">= 3.12.0, < 4.13.16", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-12T22:22:32.161Z"}, "descriptions": [{"lang": "en", "value": "Hono is a Web application framework that provides support for any JavaScript runtime. From 3.12.0 until 4.13.16, the css helper in hono/css escapes interpolated string values separately and therefore fails to neutralize a closing style tag when &lt; ends the template text or a preceding value and / begins the next attacker-controlled value. During server-side rendering, the combined output can close the &lt;Style /&gt; element early and cause the remainder of the interpolated value to be interpreted as HTML. Applications that place an untrusted string immediately after &lt; in a css template, including adjacent untrusted interpolations, can expose viewers to attacker-controlled HTML or script and information accessible to that page. Other uses of the css helper are not affected. This issue is fixed in version 4.13.16."}], "source": {"advisory": "GHSA-3gg2-335m-rxc6", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "hono", "vendor": "honojs", "versions": [{"status": "affected", "version": ">= 3.12.0, < 4.13.16"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Hono is a Web application framework that provides support for any JavaScript runtime. From 3.12.0 until 4.13.16, the css helper in hono/css escapes interpolated string values separately and therefore fails to neutralize a closing style tag when &lt; ends the template text or a preceding value and / begins the next attacker-controlled value. During server-side rendering, the combined output can close the &lt;Style /&gt; element early and cause the remainder of the interpolated value to be interpreted as HTML. Applications that place an untrusted string immediately after &lt; in a css template, including adjacent untrusted interpolations, can expose viewers to attacker-controlled HTML or script and information accessible to that page. Other uses of the css helper are not affected. This issue is fixed in version 4.13.16."}], "id": "CVE-2026-126359", "lastModified": "2026-11-13T00:20:11.370", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.4, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-13T00:20:11.233", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/commit/15bbd96ad1b62a0b189db4fd8dc7bf8ef280c513"}, {"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/releases/tag/v4.13.16"}, {"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/security/advisories/GHSA-3gg2-335m-rxc6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-11-13T16:30:04.624404+00:00", "updated": "2026-11-13T16:30:04.624413+00:00", "vendors": []}