CVE-2026-94031 0-Gaurav-0 CVE debrief

Who should care

Defenders responsible for systems using the 0-Gaurav-0 nexus-mcp tool, especially those with remote access or exploitation concerns, should assess exposure and prioritize verification and mitigation efforts.

Why it matters

CVE-2026-94031 is a command injection vulnerability in the 0-Gaurav-0 nexus-mcp tool, allowing remote attackers to inject commands via the url argument. Defenders should prioritize verification and mitigation efforts, especially if using the nexus_reauth MCP tool.

• Remote attackers may be able to inject commands, potentially leading to system compromise.
• Defenders need to verify the presence of this vulnerability in their systems and assess the potential for command injection attacks.
• The rolling release system used by the product makes it difficult to determine affected or updated versions.
• Exploitation requires authentication, but the CVSS score indicates a low severity vulnerability.

Technical summary

The vulnerability is located in the child_process.exec function of the src/auth/browser.ts file in the nexus_reauth MCP tool. An attacker can inject commands via the url argument, allowing for potential remote exploitation. This issue affects the 0-Gaurav-0 nexus-mcp tool, specifically the nexus_reauth MCP component. The product uses a rolling release system, making it difficult to determine affected or updated versions. Defenders should prioritize verifying the presence of this vulnerability in their systems, especially if using the nexus_reauth MCP tool, and assess the potential for command injection attacks.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their systems, especially if using the nexus_reauth MCP tool, and assess the potential for command injection attacks.

Recommended defensive actions

• Verify the presence of the nexus_reauth MCP tool in your systems and assess the potential for command injection attacks.
• Review the source code of src/auth/browser.ts to identify any existing mitigations or workarounds.
• Consider implementing additional security controls to prevent command injection attacks, such as input validation and sanitization.
• Monitor for any updates or patches from the vendor, if available.
• Perform a thorough review of system logs to detect any potential exploitation attempts.
• Update asset inventory to reflect systems that may be affected by this vulnerability.
• Schedule a review of compensating controls for exposed systems while remediation is pending.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected components. However, due to the rolling release system used by the product, specific version information for affected or updated releases is not available.

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.