GHSA-qp7p-654g-cw7p

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Source
https://github.com/advisories/GHSA-qp7p-654g-cw7p
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qp7p-654g-cw7p/GHSA-qp7p-654g-cw7p.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-qp7p-654g-cw7p
Aliases
  • CVE-2026-44458
Downstream
Related
Published
2026-05-09T00:46:44Z
Modified
2026-05-10T04:44:25.775599638Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Hono has CSS Declaration Injection via Style Object Values in JSX SSR
Details

Summary

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.

Details

style object values are serialized into a CSS declaration list and escaped for HTML attribute context only. Characters that act as CSS declaration boundaries — such as ;, comment markers, quoted strings, and block delimiters — are valid in HTML attribute content and can extend a value beyond its assigned property.

This issue arises when untrusted input is interpolated into a JSX style object and rendered server-side.

Impact

An attacker who can control the value or property name of a style object may inject arbitrary CSS declarations. This may lead to:

  • Visual manipulation of the page, including full-viewport overlays usable for phishing
  • Outbound requests to attacker-controlled hosts via CSS resource references such as url(...)
  • Hijacking of UI affordances through layout, positioning, or visibility changes

This issue affects applications that render JSX on the server with style object values or property names derived from untrusted input.

Database specific 
{
    "nvd_published_at": null,
    "cwe_ids": [
        "CWE-116",
        "CWE-74"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-09T00:46:44Z"
}
References

Affected packages

npm / hono

Package

Name
hono
View open source insights on deps.dev
Purl
pkg:npm/hono

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.12.18

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qp7p-654g-cw7p/GHSA-qp7p-654g-cw7p.json"