CVE-2026-44458— Hono: CSS Declaration Injection via Style Object Values in JSX SSR
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-44458
Vulnerability Information
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Vulnerability Title
Hono: CSS Declaration Injection via Style Object Values in JSX SSR
Source: NVD (National Vulnerability Database)
Vulnerability Description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, the JSX renderer escapes style attribute object values for HTML but not for CSS. Untrusted input in a style object value or property name can therefore inject additional CSS declarations into the rendered style attribute. The impact is limited to CSS and does not allow JavaScript execution or HTML attribute breakout. This vulnerability is fixed in 4.12.18.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Hono 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hono是Hono社区的一个用 TypeScript 编写的 Web 框架。 Hono 4.12.18之前版本存在注入漏洞，该漏洞源于JSX渲染器对样式属性对象值进行HTML转义但未进行CSS转义，可能导致非预期输入在样式属性中注入额外的CSS声明。
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
II. Public POCs for CVE-2026-44458
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- https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7px_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44458
Same Patch Batch · honojs · 2026-05-13 · 5 CVEs total
| CVE-2026-44456 | 6.5 MEDIUM | Hono: bodyLimit() can be bypassed for chunked / unknown-length requests |
| CVE-2026-44457 | 5.3 MEDIUM | Hono: Cache Middleware ignores Vary: Authorization / Vary: Cookie leading to cross-user ca |
| CVE-2026-44455 | 4.7 MEDIUM | Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML Injection |
| CVE-2026-44459 | 3.8 LOW | Hono: Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify() |
IV. Related Vulnerabilities
Same product: hono
- CVE-2026-44459
Hono: Improper validation of NumericDate claims (exp, nbf, i - CVE-2026-44457
Hono: Cache Middleware ignores Vary: Authorization / Vary: C - CVE-2026-44456
Hono: bodyLimit() can be bypassed for chunked / unknown-leng - CVE-2026-44455
Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML I - CVE-2026-39410
Hono has a non-breaking space prefix bypass in cookie name h
Same vendor: honojs
- CVE-2026-44459
Hono: Improper validation of NumericDate claims (exp, nbf, i - CVE-2026-44457
Hono: Cache Middleware ignores Vary: Authorization / Vary: C - CVE-2026-44456
Hono: bodyLimit() can be bypassed for chunked / unknown-leng - CVE-2026-44455
Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML I - CVE-2026-39410
Hono has a non-breaking space prefix bypass in cookie name h
Same weakness: CWE-74
- CVE-2026-42334
Mongoose: Improper Sanitization of $nor in sanitizeFilter Ma - CVE-2026-44455
Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML I - CVE-2026-42838
Microsoft Edge (Chromium-based) Elevation of Privilege Vulne - CVE-2026-33833
Azure Machine Learning Notebook Spoofing Vulnerability - CVE-2026-41109
GitHub Copilot and Visual Studio Code Security Feature Bypas
V. Comments for CVE-2026-44458
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