CVE-2026-7812Public exploitNetwork attack vector

Remote command execution via shell-interpolated git operation

Published May 5, 2026 · Updated May 5, 2026

Command injection in Code-MCP at commit 4cfc4643541a110c906d93635b391bf7e357f4a8 allows remote attackers to execute shell commands via MCP. The git_operation tool inserts its operation argument into a git command string and passes it to subprocess.Popen with shell=True; its two-item denylist leaves shell metacharacters unfiltered. An attacker must be able to invoke the MCP tool, and injected commands run with the Code-MCP process's permissions against the host and workspace.

CVSS severity7.3
High
EPSS probability1.34%
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 Code-MCP at commit 4cfc4643541a110c906d93635b391bf7e357f4a8 allows remote attackers to execute shell commands via MCP. The git_operation tool inserts its operation argument into a git command string and passes it to subprocess.Popen with shell=True; its two-item denylist leaves shell metacharacters unfiltered. An attacker must be able to invoke the MCP tool, and injected commands run with the Code-MCP process's permissions against the host and workspace.

The record

CVE
CVE-2026-7812
Published
May 5, 2026
Updated
May 5, 2026
Vendor
Yiyang (Steven) Yu
Product
Code-MCP
Classifications
CWE-77, CWE-74, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 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=4cfc4643541a110c906d93635b391bf7e357f4a8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Yiyang (Steven) Yu · Code-MCPversion=4cfc4643541a110c906d93635b391bf7e357f4a8

Published CVSS scores

7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
5.5VulDBCVSS: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

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('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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