Vulnerability-Lookup

PYSEC-2026-1622

Vulnerability from pysec - Published: 2026-07-07 16:03 - Updated: 2026-07-07 17:24

Details

In mcp-server-git versions prior to 2025.12.18, the git_diff and git_checkout functions passed user-controlled arguments directly to git CLI commands without sanitization. Flag-like values (e.g., --output=/path/to/file for git_diff) would be interpreted as command-line options rather than git refs, enabling arbitrary file overwrites. The fix adds validation that rejects arguments starting with - and verifies the argument resolves to a valid git ref via rev_parse before execution. Users are advised to update to 2025.12.18 resolve this issue.

Thank you to https://hackerone.com/yardenporat for reporting.

Severity

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:L

Impacted products

Name	purl
mcp-server-git	pkg:pypi/mcp-server-git

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "mcp-server-git",
        "purl": "pkg:pypi/mcp-server-git"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2025.12.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2.0",
        "0.3.0",
        "0.4.0",
        "0.4.1",
        "0.5.0",
        "0.5.1",
        "0.6.0",
        "0.6.1",
        "0.6.2",
        "2025.1.14",
        "2025.11.25",
        "2025.7.1",
        "2025.9.25"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-68144",
    "GHSA-9xwc-hfwc-8w59"
  ],
  "details": "In mcp-server-git versions prior to 2025.12.18, the git_diff and git_checkout functions passed user-controlled arguments directly to git CLI commands without sanitization. Flag-like values (e.g., `--output=/path/to/file` for `git_diff`) would be interpreted as command-line options rather than git refs, enabling arbitrary file overwrites. The fix adds validation that rejects arguments starting with - and verifies the argument resolves to a valid git ref via rev_parse before execution. Users are advised to update to 2025.12.18 resolve this issue.\n\nThank you to https://hackerone.com/yardenporat for reporting.",
  "id": "PYSEC-2026-1622",
  "modified": "2026-07-07T17:24:40.096301Z",
  "published": "2026-07-07T16:03:13.214568Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-9xwc-hfwc-8w59"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68144"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/modelcontextprotocol/servers"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/mcp-server-git"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-9xwc-hfwc-8w59"
    }
  ],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": " mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files"
}

CVE-2025-68144 (GCVE-0-2025-68144)

Vulnerability from cvelistv5 – Published: 2025-12-17 22:10 – Updated: 2025-12-18 15:07

Title

mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files

Summary

In mcp-server-git versions prior to 2025.12.17, the git_diff and git_checkout functions passed user-controlled arguments directly to git CLI commands without sanitization. Flag-like values (e.g., `--output=/path/to/file` for `git_diff`) would be interpreted as command-line options rather than git refs, enabling arbitrary file overwrites. The fix adds validation that rejects arguments starting with - and verifies the argument resolves to a valid git ref via rev_parse before execution. Users are advised to update to 2025.12.17 resolve this issue when it is released.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-18 14:53 UTC

CWE

CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/modelcontextprotocol/servers/s…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
modelcontextprotocol	servers	Affected: < 2025.12.17

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-68144",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-18T14:53:26.151891Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-18T15:07:03.402Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "servers",
          "vendor": "modelcontextprotocol",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2025.12.17"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In mcp-server-git versions prior to 2025.12.17, the git_diff and git_checkout functions passed user-controlled arguments directly to git CLI commands without sanitization. Flag-like values (e.g., `--output=/path/to/file` for `git_diff`) would be interpreted as command-line options rather than git refs, enabling arbitrary file overwrites. The fix adds validation that rejects arguments starting with - and verifies the argument resolves to a valid git ref via rev_parse before execution. Users are advised to update to 2025.12.17 resolve this issue when it is released."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:L",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-88",
              "description": "CWE-88: Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-17T22:10:56.086Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-9xwc-hfwc-8w59",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-9xwc-hfwc-8w59"
        }
      ],
      "source": {
        "advisory": "GHSA-9xwc-hfwc-8w59",
        "discovery": "UNKNOWN"
      },
      "title": "mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-68144",
    "datePublished": "2025-12-17T22:10:56.086Z",
    "dateReserved": "2025-12-15T19:06:04.108Z",
    "dateUpdated": "2025-12-18T15:07:03.402Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-9XWC-HFWC-8W59

Vulnerability from github – Published: 2025-12-17 22:50 – Updated: 2025-12-20 05:17

Summary

mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files

Details

Thank you to https://hackerone.com/yardenporat for reporting.

Severity

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:L

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "mcp-server-git"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2025.12.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-68144"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-88"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-17T22:50:29Z",
    "nvd_published_at": "2025-12-17T23:16:04Z",
    "severity": "MODERATE"
  },
  "details": "In mcp-server-git versions prior to 2025.12.18, the git_diff and git_checkout functions passed user-controlled arguments directly to git CLI commands without sanitization. Flag-like values (e.g., `--output=/path/to/file` for `git_diff`) would be interpreted as command-line options rather than git refs, enabling arbitrary file overwrites. The fix adds validation that rejects arguments starting with - and verifies the argument resolves to a valid git ref via rev_parse before execution. Users are advised to update to 2025.12.18 resolve this issue.\n\nThank you to https://hackerone.com/yardenporat for reporting.",
  "id": "GHSA-9xwc-hfwc-8w59",
  "modified": "2025-12-20T05:17:54Z",
  "published": "2025-12-17T22:50:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-9xwc-hfwc-8w59"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68144"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/modelcontextprotocol/servers"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": " mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

PYSEC-2026-1622

CVE-2025-68144 (GCVE-0-2025-68144)

GHSA-9XWC-HFWC-8W59

Tags

Sightings

Nomenclature

Related by attack behaviour