Which versions of Git Mcp Server are affected by CVE-2026-4496?

Organizations using sigmade Git-MCP-Server should be aware of moderate risk from CVE-2026-4496, a OS command injection vulnerability rated CVSS 5.3.. A patch is available.

Is there a public PoC exploit available for CVE-2026-4496?

Yes, a public proof-of-concept exploit is available for CVE-2026-4496. Prioritise patching immediately. EPSS: 0.2%.

Git Mcp Server CVE-2026-4496

Q: What is the CVSS score of CVE-2026-4496?

CVE-2026-4496 has a CVSS 4.0 base score of 1.9 (Low). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.2%.

EUVD-2026-13768 LOW

OS Command Injection (CWE-78)

2026-03-20 VulDB

Command Injection Git Mcp Server

1.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

1.9 LOW

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

4.8 (MEDIUM) 1.9 (LOW)

CVSS changed

Apr 22, 2026 - 21:37 NVD

5.3 (MEDIUM) 4.8 (MEDIUM)

PoC Detected

Mar 24, 2026 - 15:54 vuln.today

Public exploit code

EUVD ID Assigned

Mar 20, 2026 - 18:46 euvd

EUVD-2026-13768

Analysis Generated

Mar 20, 2026 - 18:46 vuln.today

Patch released

Mar 20, 2026 - 18:46 nvd

Patch available

CVE Published

Mar 20, 2026 - 18:32 nvd

MEDIUM 5.3

DescriptionCVE.org

A vulnerability was found in sigmade Git-MCP-Server up to 785aa159f262a02d5791a5d8a8e13c507ac42880. Affected by this vulnerability is the function child_process.exec of the file src/gitUtils.ts of the component show_merge_diff/quick_merge_summary/show_file_diff. The manipulation results in os command injection. The attack must be initiated from a local position. The exploit has been made public and could be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. It is advisable to implement a patch to correct this issue. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Local command injection in sigmade Git-MCP-Server's merge diff functions allows authenticated local attackers to execute arbitrary OS commands through unsanitized input passed to child_process.exec in src/gitUtils.ts. Public exploit code exists for this vulnerability, increasing the risk of active abuse. …

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Vulnerability AssessmentAI

Risk Assessment	While the CVSS 3.1 score of 5.3 (Medium) reflects moderate severity, multiple factors elevate the real-world risk profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A local user with standard privileges on a system running Git-MCP-Server submits a specially crafted git diff or merge request containing shell metacharacters (e.g., backticks, $(), or semicolons) embedded in a filename or branch name. Because the show_file_diff function passes this input unsanitized to child_process.exec(), the injected commands execute with the privileges of the Git-MCP-Server process. …
Remediation	Apply the available patch from the vendor via the pull request at https://github.com/sigmade/Git-MCP-Server/pull/2. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems running sigmade Git-MCP-Server and apply vendor patches as part of regular patch cycle. …

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CVE-2026-4496 vulnerability details – vuln.today

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