Vulnerabilities in pkg:npm/repostat

PACKAGE
Advisory Identifier: GHSA-fm8c-6m29-rp6j
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Advisory Summary

CVE-2026-27612 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting repostat libraries in the npm ecosystem. The issue involves reflected cross-site scripting (xss) via repo prop in repocard. Remediation is available by upgrading affected packages to version 1.0.1.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/repostat

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/repostat. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-fm8c-6m29-rp6j CVE-2026-27612 MODERATE repostat: Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard

CVE-2026-27612 at a Glance

CVE Identifier CVE-2026-27612
GHSA Identifier GHSA-fm8c-6m29-rp6j
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product repostat
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-27612

To remediate this vulnerability, upgrade all affected repostat dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

repostat fixed: 1.0.1 
npm install repostat@1.0.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls repostat

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-27612, inspect your project dependencies using npm:

npm ls repostat

Analyze the terminal output to locate any version of repostat in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.1), your application is affected.

Note: The npm ls repostat command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In repostat, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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 <RepoCard repo={maliciousRepo} token="YOUR_TOKEN" />; } ``` ### 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.

CVE-2026-27612 Affected repostat Versions

1 component(s)
Fixed Versions:
1.0.1
Product / Package Ecosystem Affected Versions Fixed Version
repostat
npm/repostat
npm
< 1.0.1
1.0.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/denpiligrim/repostat/security/advisories/GHSA-fm8c-6m29-rp6j
NVD — CVE-2026-27612 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27612
Security Fix Commit FIX COMMIT
https://github.com/denpiligrim/repostat/commit/715df5f73359d222fd7876e948d14290180e3c88
repostat Source Repository REPOSITORY
https://github.com/denpiligrim/repostat

Frequently Asked Questions

What is CVE-2026-27612?
CVE-2026-27612 is a security vulnerability in repostat involving Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which repostat versions are affected?
Affected versions include releases prior to 1.0.1 across affected packages: repostat.
What version fixes CVE-2026-27612?
Upgrading to 1.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is repostat affected?
Yes, repostat is affected in releases prior to 1.0.1. Upgrade your dependency to 1.0.1 or later.
What is the CVSS score of CVE-2026-27612?
CVE-2026-27612 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-27612?
CVE-2026-27612 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2026-27612?
Run the dependency tree command: 'npm ls repostat'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fm8c-6m29-rp6j",
  "modified" : "2026-02-25T16:04:41Z",
  "published" : "2026-02-25T16:04:41Z",
  "aliases" : [ "CVE-2026-27612" ],
  "summary" : "repostat: Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard",
  "details" : "### Impact\nThe `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. \n\nIf 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.\n\n### Proof of Concept\n```jsx\nimport { RepoCard } from 'repostat';\n\nfunction App() {\n  const params = new URLSearchParams(window.location.search);\n  const maliciousRepo = params.get('repo') || 'facebook/react';\n\n  return <RepoCard repo={maliciousRepo} token=\"YOUR_TOKEN\" />;\n}\n```\n\n### Remediation\nUpdate 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "repostat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/denpiligrim/repostat/security/advisories/GHSA-fm8c-6m29-rp6j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-27612"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/denpiligrim/repostat/commit/715df5f73359d222fd7876e948d14290180e3c88"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/denpiligrim/repostat"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-25T16:04:41Z",
    "nvd_published_at" : "2026-02-25T03:16:05Z"
  }
}