CVE-2026-27612CWE-79

Repostat Vulnerable to Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard

Medium · published February 25, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
20.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00288 · 20.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-25T02:38Z
EPSS history
Timeline
  • 25 FEB 02:38Z
    Repostat Vulnerable to Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard
    cvelistv5