Cross-site scripting in hono - CVE-2026-93981
Published: September 29, 2026
Vulnerability identifier: #VU152731
CSH Severity: Medium
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-93981
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to inject arbitrary HTML and execute cross-site scripting in the application's origin.
The vulnerability exists due to improper neutralization of input during web page generation in hono/jsx server-side rendering boundary components when rendering an attacker-controlled plain string directly in an affected position. A remote attacker can supply a crafted string that is emitted as markup to inject arbitrary HTML and execute cross-site scripting in the application's origin.
User interaction is required to view the server-rendered page containing the crafted string.
Affected software
hono
How to mitigate CVE-2026-93981
Install security update from vendor's website.
hono - update to 4.13.7