{"id":"CVE-2026-93981","revision":null,"records":[{"revision":"01f67ed432fd42658e23fdbb6c5b0809","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93981","aliases":[],"title":"hono/jsx before 4.13.7 Cross-Site Scripting via Unescaped Strings","description":"hono before 4.13.7 fails to HTML-escape plain strings rendered by hono/jsx as a child or fallback of Suspense, as a string child of ErrorBoundary alongside an asynchronous sibling, as the single child of a Context.Provider, or as the root value passed to renderToString() or renderToReadableStream() from hono/jsx/dom/server. These paths stringify their input and treat the result as already-escaped markup, so an attacker who controls such a string during server-side rendering can inject arbitrary HTML and execute script under the application's origin.","state":0,"publishedAt":"2026-09-19T11:53:34.294+00:00","modifiedAt":"2026-09-21T20:47:06.182+00:00","affected":[{"ecosystem":"Vendor product","name":"hono","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"honojs\",\n                    \"product\": \"hono\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/hono\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"4.13.7\"\n                        },\n                        {\n                            \"version\": \"4.13.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","score":2.3,"severity":"LOW"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","score":4.7,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-hxh3-vqpv-xpqv","https://www.vulncheck.com/advisories/hono-jsx-before-4.13.7-cross-site-scripting-via-unescaped-strings"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93981","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93981","identifiers":["CVE-2026-93981"]},"retained":false,"historicalAffected":[]},{"revision":"e28468cbabbe4cddba8e41600d894c0a","observedAt":"2026-11-10T02:11:00.795+00:00","statement":{"source":"euvd","id":"EUVD-2026-83586","aliases":["CVE-2026-93981","GHSA-6623-4q32-82v8","GHSA-hxh3-vqpv-xpqv"],"title":"hono before 4.13.7 fails to HTML-escape plain strings rendered by hono/jsx as a child or fallback of Suspense, as a string child of ErrorBoundary alongside an asynchronous sibling, as the single child of a Context.Provider, or as the root v…","description":"hono before 4.13.7 fails to HTML-escape plain strings rendered by hono/jsx as a child or fallback of Suspense, as a string child of ErrorBoundary alongside an asynchronous sibling, as the single child of a Context.Provider, or as the root value passed to renderToString() or renderToReadableStream() from hono/jsx/dom/server. These paths stringify their input and treat the result as already-escaped markup, so an attacker who controls such a string during server-side rendering can inject arbitrary HTML and execute script under the application's origin.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","score":2.3,"severity":null}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-hxh3-vqpv-xpqv","https://www.vulncheck.com/advisories/hono-jsx-before-4.13.7-cross-site-scripting-via-unescaped-strings"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83586","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 19, 2026, 11:53:34 AM","dateUpdated":"Sep 21, 2026, 8:47:06 PM"},"relatedAdvisories":[{"id":"RHSA-2026:73655","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","vulnerabilityIds":["CVE-2026-76154","CVE-2026-81842","CVE-2026-93981"]},{"id":"RHSA-2026:73654","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","vulnerabilityIds":["CVE-2026-93981"]},{"id":"RHSA-2026:74869","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","vulnerabilityIds":["CVE-2026-93981","CVE-2026-101898","CVE-2026-101900","CVE-2026-101901","CVE-2026-101902","CVE-2026-101903","CVE-2026-101904","CVE-2026-101905","CVE-2026-101906","CVE-2026-101907","CVE-2026-101908","CVE-2026-101909"]},{"id":"RHSA-2026:71906","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","vulnerabilityIds":["CVE-2026-75838","CVE-2026-86472","CVE-2026-93450","CVE-2026-93981"]}],"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. 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Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-93981","identifiers":["CVE-2026-93981"]},"retained":false,"historicalAffected":[]},{"revision":"f167b44210d64e59b2b73659d4508994","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-6623-4q32-82v8","aliases":[],"title":"Duplicate Advisory: hono/jsx renders plain strings unescaped in boundary components, leading to XSS","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00A0GHSA-hxh3-vqpv-xpqv. This link is maintained to preserve external references.\n\n## Original Description\nhono before 4.13.7 fails to HTML-escape plain strings rendered by hono/jsx as a child or fallback of Suspense, as a string child of ErrorBoundary alongside an asynchronous sibling, as the single child of a Context.Provider, or as the root value passed to renderToString() or renderToReadableStream() from hono/jsx/dom/server. These paths stringify their input and treat the result as already-escaped markup, so an attacker who controls such a string during server-side rendering can inject arbitrary HTML and execute script under the application's origin.","state":2,"publishedAt":"2026-09-19T12:32:10+00:00","modifiedAt":"2026-10-01T00:00:05.6527398+00:00","affected":[{"ecosystem":"npm","name":"hono","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-hxh3-vqpv-xpqv","https://nvd.nist.gov/vuln/detail/CVE-2026-93981","https://www.vulncheck.com/advisories/hono-jsx-before-4.13.7-cross-site-scripting-via-unescaped-strings"],"sourceUrl":"https://github.com/advisories/GHSA-6623-4q32-82v8","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-6623-4q32-82v8","identifiers":["GHSA-6623-4q32-82v8"]},"retained":false,"historicalAffected":[]},{"revision":"cddefbdf75e54ed9933b99b15cd61340","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-hxh3-vqpv-xpqv","aliases":["CVE-2026-93981"],"title":"hono/jsx renders plain strings unescaped in boundary components, leading to XSS","description":"### Summary\n\n`hono/jsx` does not HTML-escape a plain string placed directly as a child or `fallback` of `Suspense` or `ErrorBoundary`, as the only child of a `Context.Provider`, or as the root value of `renderToString()` / `renderToReadableStream()` from `hono/jsx/dom/server`. Such a string is emitted as markup instead of text.\n\n### Details\n\nThese paths stringify their input and treat the result as already-escaped HTML, so a plain string passes through unchanged. Notable cases:\n\n- `Suspense`: a string child, or a string `fallback` while a child suspends. With streaming, the fallback reaches the browser in the initial chunk.\n- `ErrorBoundary`: a string child alongside an asynchronous sibling. The all-synchronous case was fixed in 4.11.7 (GHSA-9r54-q6cx-xmh5).\n- `Context.Provider`: a single string child. Multiple children are escaped.\n- `hono/jsx/dom/server`: a string, or an array containing strings, passed as the root.\n\nA lone `{children}` forwarded by a wrapper component is enough to reach these paths. Strings wrapped in an element, values from `raw()` or the `html` helper, and client-side rendering with `hono/jsx/dom` are not affected.\n\n### Impact\n\nAn attacker who controls a string rendered in an affected position can inject arbitrary HTML into the server-rendered page, leading to cross-site scripting under the application's origin.\n\nThis issue affects applications that render untrusted strings directly in one of the positions above during server-side rendering.","state":0,"publishedAt":"2026-09-30T23:46:16+00:00","modifiedAt":"2026-10-01T00:00:05.750908+00:00","affected":[{"ecosystem":"npm","name":"hono","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.13.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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-hxh3-vqpv-xpqv","https://nvd.nist.gov/vuln/detail/CVE-2026-93981","https://github.com/honojs/hono/commit/2b8ed402cdab6dfc5e829b480806dcd8db94161e","https://github.com/honojs/hono","https://github.com/honojs/hono/releases/tag/v4.13.7","https://www.vulncheck.com/advisories/hono-jsx-before-4.13.7-cross-site-scripting-via-unescaped-strings"],"sourceUrl":"https://github.com/advisories/GHSA-hxh3-vqpv-xpqv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-hxh3-vqpv-xpqv","identifiers":["GHSA-hxh3-vqpv-xpqv","CVE-2026-93981"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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