{"id":"CVE-2026-93981","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 roo…","summary":"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 roo…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"honojs","product":"hono","affected":["hono < 4.13.7"],"published":"2026-09-19","updated":"2026-09-21","sourceUpdated":"2026-09-21T21:17:20.740","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93981","references":[{"url":"https://github.com/honojs/hono/security/advisories/GHSA-hxh3-vqpv-xpqv","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/hono-jsx-before-4.13.7-cross-site-scripting-via-unescaped-strings","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93981.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93981"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2538284"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93981"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93981"},{"url":"https://access.redhat.com/errata/RHSA-2026:71906"},{"url":"https://github.com/honojs/hono/commit/2b8ed402cdab6dfc5e829b480806dcd8db94161e"},{"url":"https://github.com/honojs/hono/releases/tag/v4.13.7"},{"url":"https://github.com/advisories/GHSA-hxh3-vqpv-xpqv"},{"url":"https://access.redhat.com/errata/RHSA-2026:73654"},{"url":"https://access.redhat.com/errata/RHSA-2026:73655"},{"url":"https://access.redhat.com/errata/RHSA-2026:74869"}],"tags":["nvd","cve.org","csaf","vex","red-hat","ghsa","npm"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-21T16:22:56.367930Z"},"epss":0.00227,"epssPercentile":0.13411,"ingestedAt":"2026-09-19T12:02:33.564Z","patched":["hardened_images"],"aliases":["GHSA-hxh3-vqpv-xpqv"],"ecosystem":"npm","slug":"CVE-2026-93981","body":"## Overview\n\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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:71906** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:71906)\n- **Red Hat VEX** · Moderate · affected: Migration Toolkit for Applications 8, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux 10, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Dev Spaces · no fix planned: Migration Toolkit for Applications 8, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux 10, Red Hat OpenShift AI (RHOAI), … · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93981.json)\n- **RHSA-2026:73654** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:73654)\n- **RHSA-2026:73655** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:73655)\n- **RHSA-2026:74869** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:74869)\n\n## Package advisory (CVE-2026-93981)\n\nAffected packages:\n\n- `hono < 4.13.7`\n\nPatched in:\n\n- `hono 4.13.7`\n\nSource: https://github.com/advisories/GHSA-hxh3-vqpv-xpqv","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}