Vulnerability · Published Feb 25, 2026 · Assigned by GitHub_M
CVE-2026-27612Repostat Vulnerable to Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard
Medium 6.1
In plain English
A medium-severity cross-site scripting in repostat from denpiligrim. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Repostat is a React component to fetch and display GitHub repository info. Prior to version 1.0.1, 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. In 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | repostat | 1.0.1 | GHSA-fm8c-6m29-rp6j |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| denpiligrim | repostat | < 1.0.1 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N