CVE-2026-30623Public exploitNetwork attack vector

Authenticated command execution via unvalidated MCP stdio configuration

Published Jul 15, 2026 · Updated Jul 15, 2026

Command injection in LiteLLM before 1.83.6-nightly allows remote authenticated users to execute operating system commands via MCP requests. The MCP server create, update, and preview paths pass a JSON-supplied stdio command directly to StdioServerParameters, which spawns it as a subprocess without validation. A valid LiteLLM API key and access to the affected endpoints are required; commands run with the privileges and data access of the LiteLLM process.

CVSS severity9.8
Critical
EPSS probability5.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in LiteLLM before 1.83.6-nightly allows remote authenticated users to execute operating system commands via MCP requests. The MCP server create, update, and preview paths pass a JSON-supplied stdio command directly to StdioServerParameters, which spawns it as a subprocess without validation. A valid LiteLLM API key and access to the affected endpoints are required; commands run with the privileges and data access of the LiteLLM process.

The record

CVE
CVE-2026-30623
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8National Vulnerability DatabaseCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

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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