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.

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History

Wed, 23 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 21 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 19 Sep 2026 12:00:00 +0000

Type Values Removed Values Added
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.
Title hono/jsx before 4.13.7 Cross-Site Scripting via Unescaped Strings
First Time appeared Hono
Hono hono
Weaknesses CWE-79
CPEs cpe:2.3:a:hono:hono:*:*:*:*:*:*:*:*
Vendors & Products Hono
Hono hono
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.3, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-21T20:47:06.182Z

Reserved: 2026-09-19T10:55:49.092Z

Link: CVE-2026-93981

cve-icon Vulnrichment

Updated: 2026-09-21T16:22:57.390Z

cve-icon NVD

Status : Deferred

Published: 2026-09-19T12:16:41.080

Modified: 2026-09-21T21:17:20.740

Link: CVE-2026-93981

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-19T11:53:34Z

Links: CVE-2026-93981 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T03:00:10Z

Weaknesses