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CVE-2026-27612
February 25, 2026
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
repostat (NPM):
Affected version(s) =1.0.0 <1.0.1
Fix Suggestion:
Update to version 1.0.1
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.03