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Vulnerability record · CVE-2026-59896 · published 8 July 2026

CVE-2026-59896: Hono race condition vulnerability

Hono · Hono

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.

6.5 CVSS 3.1 Medium EPSS 0.30% · top 79.7% CWE-362 · Race condition
6.5CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
10 Jul 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64f Patch
https://github.com/honojs/hono/releases/tag/v4.12.27 Release Notes
https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfj Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-59896), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.