CVE-2026-27612 Denpiligrim CVE debrief

Who should care

Developers using Repostat, security teams responsible for vulnerability management, and DevOps teams responsible for updating dependencies. Additionally, operators and administrators of platforms using Repostat should review and update their deployments to ensure they are not exposed to this vulnerability. Vulnerability management teams should prioritize verifying and updating Repostat to version 1.0.1 or later. Security teams should ensure that user input

Why it matters

CVE-2026-27612 is a Reflected Cross-Site Scripting (XSS) vulnerability in Repostat that allows an attacker to execute arbitrary JavaScript in the context of the user's browser. Defenders should prioritize verifying and updating Repostat to version 1.0.1 or later, and ensure that user input is properly sanitized when using the `repo` prop.

• An attacker can execute arbitrary JavaScript in the context of the user's browser
• Defenders need to verify and update Repostat to version 1.0.1 or later
• Defenders need to ensure user input is properly sanitized when using the `repo` prop

Technical summary

The Repostat React component is vulnerable to Reflected Cross-Site Scripting (XSS) due to the use of `dangerouslySetInnerHTML` to render the repository name during the loading state without sanitization. This allows an attacker to execute arbitrary JavaScript in the context of the user's browser if a developer passes unvalidated user input directly into the `repo` prop. The vulnerability occurs because the `RepoCard` component uses React's `dangerouslySetInnerHTML` to render the repository name during the loading state without any sanitization. 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

Defensive priority

Defenders should prioritize verifying and updating Repostat to version 1.0.1 or later, and ensure that user input is properly sanitized when using the `repo` prop.

Recommended defensive actions

• Verify and update Repostat to version 1.0.1 or later
• Ensure user input is properly sanitized when using the `repo` prop
• Review and update code that uses Repostat to prevent unvalidated user input
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The vendor has released a patch in version 1.0.1. Developers should verify and update Repostat to version 1.0.1 or later, and ensure that user input is properly sanitized when using the `repo` prop. The vulnerability allows an attacker to execute arbitrary JavaScript in the context of the user's browser if a developer passes unvalidated user input directly into the `repo` prop. The Repostat React component's

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.