GitHub Advisoryadvisory · npm

GHSA-fm8c-6m29-rp6j repostat: Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard

MEDIUM Published 2026-02-25 Modified 2026-02-25 Official page ↗
Aliases
CVE-2026-27612
Ecosystem
npm
Packages
repostat
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses
CWE-79
Reviewed
2026-02-25

Affected packages

• npm repostat: < 1.0.1 → fixed in 1.0.1

Description

Impact The `RepoCard` component is vulnerable to Reflected Cross-Site Scripting (XSS). The vulnerability occurs because the component uses React's `dangerouslySetInnerHTML` to render the repository name (`repo` prop) during the loading state without any sanitization. If a developer using this package passes unvalidated user input directly into the `repo` prop (for example, reading it from a URL query parameter), an attacker can execute arbitrary JavaScript in the context of the user's browser. Proof of Concept ```jsx import { RepoCard } from 'repostat'; function App() { const params = new URLSearchParams(window.location.search); const maliciousRepo = params.get('repo') || 'facebook/react'; return ; } ``` Remediation Update to version 1.0.1. The use of dangerouslySetInnerHTML has been removed, and the repo prop is now safely rendered using standard React JSX data binding, which automatically escapes HTML entities.

Related

Alias · CVE (1)

  • CVE-2026-27612 Repostat is a React component to fetch and display GitHub repository info. vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References