CVE-2026-56761

Description

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.

CVSS Vector

References

• https://github.com/honojs/hono/security/advisories/GHSA-458j-xx4x-4375
• https://www.vulncheck.com/advisories/hono-html-injection-via-improper-jsx-attribute-name-handling-in-ssr