Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
GHSA-hxh3-vqpv-xpqv affects the hono npm package versions below 4.13.7, where hono/jsx does not HTML-escape plain strings placed directly in certain positions, such as children or fallback of Suspense or ErrorBoundary, a single child of Context.Provider, or the root value passed to server rendering functions. An attacker who can control such a string that an application renders during server-side rendering can inject arbitrary HTML, leading to cross-site scripting under the application's origin. Upgrade hono to version 4.13.7 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 2.3 | Low | 4.0 | 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 | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0023, the 13th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 4 Sept 2026, 19:16 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 13:34 UTC First seen by agentprime
- 31 Oct 2026, 13:34 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-hxh3-vqpv-xpqv
- OSV: GHSA-hxh3-vqpv-xpqv
- github.com/honojs/hono/security/advisories/GHSA-hxh3-vqpv-xpqv
- nvd.nist.gov/vuln/detail/CVE-2026-93981
- github.com/honojs/hono/commit/2b8ed402cdab6dfc5e829b480806dcd8db94161e
- github.com/honojs/hono
- github.com/honojs/hono/releases/tag/v4.13.7
- www.vulncheck.com/advisories/hono-jsx-before-4.13.7-cross-site-scripting-via-unescaped-strings