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CVE-2026-56761— hono - HTML Injection via Improper JSX Attribute Name Handling in SSR

Quick assessment

Affected
hono hono
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hono是Hono团队开源的一个用 TypeScript 编写的 Web 框架。 Hono 4.12.14之前版本存在跨站脚本漏洞，该漏洞源于jsx服务端渲染过程中属性名称处理不当，可能允许攻击者通过使用畸形的属性名称注入意外的HTML。

CVSS 4.3 · Medium EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
hono hono < 4.12.14 affected
4.12.14 unaffected
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I. Basic Information for CVE-2026-56761

Vulnerability Information
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Vulnerability Title
hono - HTML Injection via Improper JSX Attribute Name Handling in SSR
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Hono 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hono是Hono团队开源的一个用 TypeScript 编写的 Web 框架。 Hono 4.12.14之前版本存在跨站脚本漏洞，该漏洞源于jsx服务端渲染过程中属性名称处理不当，可能允许攻击者通过使用畸形的属性名称注入意外的HTML。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hono hono 0 ~ 4.12.14 -

II. Public POCs for CVE-2026-56761

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III. Intelligence Information for CVE-2026-56761

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Vendor Advisories for CVE-2026-56761 (2)

IV. Related Vulnerabilities

Same product: hono
Same vendor: hono
Same weakness: CWE-79

V. Comments for CVE-2026-56761

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