SB2026072455 - Cross-site scripting in hono

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Main Vulnerability Database SB2026072455

SB2026072455 - Cross-site scripting in hono

Published: July 24, 2026

Security Bulletin ID SB2026072455
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Cross-site scripting (CVE-ID: CVE-2026-56761)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]


The vulnerability allows a remote attacker to inject unintended HTML into server-side rendered output.

The vulnerability exists due to cross-site scripting in hono/jsx server-side rendering when using untrusted input as JSX attribute keys. A remote attacker can supply specially crafted attribute names to inject unintended HTML into server-side rendered output.

User interaction is required to load the rendered content, and potential cross-site scripting may occur if the injected output is used in unsafe patterns.


Remediation

Install update from vendor's website.

References