medium6.5
CVE-2026-59896
hono/jsx does not isolate context per request, leading to cross-request data disclosure
Impact
Hono is a Web application framework that provides support for any JavaScript runtime. From 4.11.8 before 4.12.27, hono/jsx did not isolate context values per request during server-side rendering, allowing createContext, useContext, jsxRenderer, or useRequestContext data from a different in-flight request to be used after an await in an async component. This issue is fixed in version 4.12.27.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | hono | >= 4.11.8, < 4.12.27 | 4.12.27 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Hono | Hono | from 4.11.8 before 4.12.27 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-hvrm-45r6-mjfj
- https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj
- https://nvd.nist.gov/vuln/detail/CVE-2026-59896
- https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f
- https://github.com/honojs/hono/releases/tag/v4.12.27