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CVE-2026-93981

hono/jsx before 4.13.7 Cross-Site Scripting via Unescaped Strings

CVSS 4.0 2.3 LOWCVSS 3.1 4.7 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-93981

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-93981

Published

hono

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "honojs",
                    "product": "hono",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/hono",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "4.13.7"
                        },
                        {
                            "version": "4.13.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON