Medium 6.5Published Jul 8, 2026

CVE-2026-59896hono/jsx does not isolate context per request, leading to cross-request data disclosure

Updated under an hour ago (Oct 26, 2026, 12:23 PM ET)

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It affects honojs hono and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for honojs hono

Exploited in the last 30 days

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: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

honojs hono honojs:hono (from the name)	from 4.11.8, < 4.12.27	CNA record
hono hono hono:hono	from 4.11.8 before 4.12.27	NVD

References

https://github.com/honojs/hono/security/advisories/GHSA-hvrm-45r6-mjfjx-refsource-confirm, vendor-advisory
https://github.com/honojs/hono/commit/fab3b13639339cbd5ba1166a5b23d9ac30c5f64fx-refsource-misc, patch
https://github.com/honojs/hono/releases/tag/v4.12.27x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.