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TI-2026-32398 Aliases CVE-2026-44458GHSA-qp7p-654g-cw7p

Hono: CSS Declaration Injection via Style Object Values in JSX SSR

Priority LOW 19CWE-116Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00197 9th percentileScored 2026-11-07
Fix Fixed hono (honojs): 4.12.18hono (npm): 4.12.18

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

VendorProductAffected versionsFixed inStatusSource
honojshonobefore 4.12.184.12.18Patch availableCNA
—hono (npm)before 4.12.184.12.18Patch availableGHSA-qp7p-654g-cw7p
  • hono Vendorhonojs Affected before 4.12.18 Fixed in 4.12.18 Patch available CNA
  • hono (npm) Vendor— Affected before 4.12.18 Fixed in 4.12.18 Patch available GHSA-qp7p-654g-cw7p

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*before 4.12.18Vulnerablehonojs
  • cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:* Versions before 4.12.18 Vulnerable ·honojs

Remediation

  • Fix · CNA hono (honojs) Fixed in 4.12.18
  • Fix · GHSA-qp7p-654g-cw7p hono (npm) Fixed in 4.12.18 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44458
  2. 2026-10-03 Alias added: GHSA-qp7p-654g-cw7p

References

Advisory 1

Other 1

  • 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
See all 33 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences