Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML Injection
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.16, Improper handling of JSX element tag names in hono/jsx allowed unvalidated tag names to be directly inserted into the generated HTML output. When untrusted input is used as a tag name via the programmatic jsx() or createElement() APIs during server-side rendering, specially crafted values may break out of the intended element context and inject unintended HTML. This vulnerability is fixed in 4.12.16.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| honojs | hono | before 4.12.16 | 4.12.16 | Patch available | CNA |
| — | hono (npm) | before 4.12.16 | 4.12.16 | Patch available | GHSA-69xw-7hcm-h432 |
- hono Vendorhonojs Affected before 4.12.16 Fixed in 4.12.16 Patch available CNA
- hono (npm) Vendor— Affected before 4.12.16 Fixed in 4.12.16 Patch available GHSA-69xw-7hcm-h432
Remediation
- Fix · CNA hono (honojs) Fixed in 4.12.16
- Fix · GHSA-69xw-7hcm-h432 hono (npm) Fixed in 4.12.16 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44455
- 2026-10-03 Alias added: GHSA-69xw-7hcm-h432
References
More honojs Hono vulnerabilities
- TI-2024-21741 Hono vulnerable to Restricted Directory Traversal in serveStatic with deno CVSS 3.1MEDIUM 5.3
- TI-2024-32610 Hono vulnerable to bypass of CSRF Middleware by a request without Content-Type header. CVSS 3.1MEDIUM 5.9
- TI-2024-29381 Hono CSRF middleware can be bypassed using crafted Content-Type header CVSS 3.1MEDIUM 5.0
- TI-2026-23190 Hono: Arbitrary file access via serveStatic vulnerability CVSS 3.1CRITICAL 9.8
- TI-2026-22076 Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo CVSS 3.1HIGH 8.2
- TI-2026-18334 JWT algorithm confusion in Hono JWK Auth Middleware when JWK lacks "alg" (untrusted header.alg fallback) CVSS 3.1HIGH 8.2
Sources
- CVE-2026-44455 · CVE Program
- CVE-2026-44455 · NVD
- FIRST EPSS
- GHSA-69xw-7hcm-h432 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences