CVE-2026-57863 crater-invoice-inc CVE debrief

Who should care

System administrators and security teams responsible for Crater Invoice installations should assess exposure and prioritize remediation due to the high CVSS score and potential for remote code execution.

Why it matters

CVE-2026-57863 is a high-severity path traversal vulnerability in Crater Invoice that allows authenticated company owners to write arbitrary files, potentially leading to remote code execution. System administrators and security teams should assess exposure, prioritize remediation, and verify affected versions and remediation status.

• Remote code execution on the server
• Potential for arbitrary file writes outside intended directories
• Requires verification of affected versions and remediation status
• Authenticated vulnerability with potential for high impact

Technical summary

The Crater Invoice self-update API is vulnerable to path traversal, allowing authenticated company owners to write arbitrary files outside the intended extraction directory by supplying crafted ZIP archives. This can lead to remote code execution on the server by writing arbitrary PHP files into the web-accessible public directory. The vulnerability is caused by unsanitized ZIP entry names passed to PHP's ZipArchive::extractTo(). The CVE record and NVD entry provide details on the path traversal vulnerability in Crater Invoice through 6.0.6. The vulnerability allows authenticated company owners to write arbitrary files outside the intended extraction directory, potentially leading to remote code execution on

Defensive priority

High priority for system administrators and security teams

Recommended defensive actions

• Review and update Crater Invoice to version 6.0.7 or later
• Restrict access to the self-update API to authorized personnel
• Monitor for suspicious activity on the server
• Verify server configurations and file permissions
• Perform a thorough review of the server's file system to identify potential backdoors
• Implement additional security measures, such as web application firewalls, to detect and prevent exploitation
• Conduct regular security audits to identify and address potential vulnerabilities

Evidence notes

The CVE record and NVD entry provide details on the path traversal vulnerability in Crater Invoice through 6.0.6. The vulnerability allows authenticated company owners to write arbitrary files outside the intended extraction directory. Limited information is available on exploitation and affected versions.

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.