CVE-2026-0757Network attack vector

Sandbox escape via unvalidated MCP config string

Published Jan 23, 2026 · Updated Jan 23, 2026

Command injection in MCP Manager for Claude Desktop allows remote attackers to escape its sandbox and execute arbitrary code. The MCP config-object processor passes a user-supplied string to an operating-system call without proper validation, allowing command syntax to alter the executed operation. Exploitation requires the target to visit a malicious page or open a malicious file; resulting code runs in the current process at medium integrity.

CVSS severity8.8
High
EPSS probability1.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in MCP Manager for Claude Desktop allows remote attackers to escape its sandbox and execute arbitrary code. The MCP config-object processor passes a user-supplied string to an operating-system call without proper validation, allowing command syntax to alter the executed operation. Exploitation requires the target to visit a malicious page or open a malicious file; resulting code runs in the current process at medium integrity.

The record

CVE
CVE-2026-0757
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
Ashray
Product
MCP Manager for Claude Desktop
Classifications
CWE-78, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1140651e836cabe746f444bdc449cdd2429c4bca

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ashray · MCP Manager for Claude Desktopversion=1140651e836cabe746f444bdc449cdd2429c4bca

Published CVSS scores

8.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:R/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo