CVE-2026-56761CWE-79

hono - HTML Injection via Improper JSX Attribute Name Handling in SSR

Medium · published June 24, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
20.8
In the wild
Unconfirmed
What it is

hono before 4.12.14 contains an html injection vulnerability in jsx server-side rendering that allows attackers to inject unintended html by using malformed attribute names. Attackers can craft specially crafted attribute keys containing characters like quotes or angle brackets to break html tag boundaries and inject arbitrary attributes or elements.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00293 · 20.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-24T11:53Z
EPSS history
Timeline
  • 24 JUN 11:53Z
    hono - HTML Injection via Improper JSX Attribute Name Handling in SSR
    cvelistv5