CVE-2026-44717Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted eval

Published May 15, 2026 · Updated May 15, 2026

Code injection in 611711Dark MCP Calculate Server before 0.1.1 allows remote attackers to execute arbitrary Python code through MCP requests. The calculate_expression tool passes an externally supplied expression to Python eval() without restricting imports, attributes, or code syntax. No authentication or user interaction is required once the MCP endpoint is reachable, and injected code runs with the server process's privileges.

CVSS severity9.8
Critical
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in 611711Dark MCP Calculate Server before 0.1.1 allows remote attackers to execute arbitrary Python code through MCP requests. The calculate_expression tool passes an externally supplied expression to Python eval() without restricting imports, attributes, or code syntax. No authentication or user interaction is required once the MCP endpoint is reachable, and injected code runs with the server process's privileges.

The record

CVE
CVE-2026-44717
Published
May 15, 2026
Updated
May 15, 2026
Vendor
611711Dark
Product
MCP Calculate Server
Classifications
CWE-1427, CWE-94, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

611711Dark · MCP Calculate Serverversion=< 0.1.1

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1427Improper Neutralization of Input Used for LLM Prompting
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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