Medium severity6.1NVD Advisory· Published Jul 8, 2026· Updated Jul 10, 2026
CVE-2026-59895
CVE-2026-59895
Description
Hono is a Web application framework that provides support for any JavaScript runtime. From 4.0.0 before 4.12.27, cx() in hono/css composes class names from plain strings but marks the result as already escaped without HTML-escaping the input, allowing untrusted className values used in a JSX class attribute during server-side rendering to break out of the attribute and inject arbitrary markup. This issue is fixed in version 4.12.27.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
hononpm | >= 4.0.0, < 4.12.27 | 4.12.27 |
Affected products
26- osv-coords24 versionspkg:apk/chainguard/wazuh-dashboard-dashboards-visualizations-fipspkg:apk/chainguard/wazuh-dashboard-alerting-dashboards-pluginpkg:apk/chainguard/wazuh-dashboard-anomaly-detection-dashboards-pluginpkg:apk/chainguard/wazuh-dashboard-index-management-dashboards-plugin-fipspkg:apk/chainguard/wazuh-dashboard-dashboards-notificationspkg:apk/chainguard/wazuh-dashboard-pluginspkg:apk/chainguard/librechatpkg:apk/chainguard/wazuh-dashboardpkg:apk/wolfi/langfuse-3-workerpkg:apk/chainguard/langfuse-3-workerpkg:apk/chainguard/wazuh-dashboard-dashboards-maps-fipspkg:apk/chainguard/wazuh-dashboard-index-management-dashboards-pluginpkg:apk/chainguard/wazuh-dashboard-security-pluginpkg:apk/chainguard/wazuh-dashboard-dashboards-notifications-fipspkg:apk/chainguard/wazuh-dashboard-plugins-fipspkg:apk/chainguard/wazuh-dashboard-anomaly-detection-dashboards-plugin-fipspkg:apk/chainguard/langfuse-fips-3-workerpkg:apk/chainguard/wazuh-dashboard-dashboards-mapspkg:apk/chainguard/wazuh-dashboard-security-plugin-fipspkg:apk/chainguard/wazuh-dashboard-dashboards-reporting-fipspkg:apk/chainguard/wazuh-dashboard-dashboards-visualizationspkg:apk/chainguard/wazuh-dashboard-dashboards-reportingpkg:apk/chainguard/wazuh-dashboard-fipspkg:apk/chainguard/wazuh-dashboard-alerting-dashboards-plugin-fips
< 4.14.7-r2+ 23 more
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 0.8.7-r5
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 3.224.1-r0
- (no CPE)range: < 3.224.1-r0
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 3.224.1-r0
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
- (no CPE)range: < 4.14.7-r2
Patches
Vulnerability mechanics
References
5- github.com/honojs/hono/commit/cd3f6f7194f0e5c9d4b26ae0cf232018d0f388fcnvdPatchWEB
- github.com/advisories/GHSA-w62v-xxxg-mg59ghsaADVISORY
- github.com/honojs/hono/security/advisories/GHSA-w62v-xxxg-mg59nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-59895ghsaADVISORY
- github.com/honojs/hono/releases/tag/v4.12.27nvdRelease NotesWEB
News mentions
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