Repostat
CVE-2026-27612
MEDIUM
GHSA-fm8c-6m29-rp6j
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 6.1 (MEDIUM). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: Required. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Reflected XSS in Repostat's RepoCard React component prior to version 1.0.1 allows attackers to execute arbitrary JavaScript in users' browsers when developers pass unsanitized input from URL parameters or other sources to the repo prop. The vulnerability stems from unsafe use of dangerouslySetInnerHTML without input validation, and public exploit code exists. Upgrading to version 1.0.1 or later eliminates the risk by removing dangerouslySetInnerHTML in favor of safe JSX data binding.
Earlier versions of this analysis (1)
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). [CVSS 6.1 MEDIUM]
RemediationAI
A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in npm
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Repostat. 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 para
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
Executive ViewAI
Organizations using Repostat should be aware of moderate risk from CVE-2026-27612, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: implement CSP headers, enable HttpOnly cookies, deploy WAF XSS rules.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Exploit-DB