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GHSA-2GFJ-FR43-4735

Vulnerability from github – Published: 2026-04-29 18:31 – Updated: 2026-04-29 18:31

Details

A flaw has been found in fatbobman mail-mcp-bridge up to 1.3.3. Affected is an unknown function of the file src/mail_mcp_server.py. Executing a manipulation of the argument message_ids can lead to path traversal. The attack can be executed remotely. The exploit has been published and may be used. Upgrading to version 1.3.4 is able to address this issue. This patch is called 638b162b26532e32fa8d8047f638537dbdfe197a. Upgrading the affected component is recommended.

Severity

7.3 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

5.5 (Medium)


                  
                    CVSS: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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-7386"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-29T16:16:29Z",
    "severity": "MODERATE"
  },
  "details": "A flaw has been found in fatbobman mail-mcp-bridge up to 1.3.3. Affected is an unknown function of the file src/mail_mcp_server.py. Executing a manipulation of the argument message_ids can lead to path traversal. The attack can be executed remotely. The exploit has been published and may be used. Upgrading to version 1.3.4 is able to address this issue. This patch is called 638b162b26532e32fa8d8047f638537dbdfe197a. Upgrading the affected component is recommended.",
  "id": "GHSA-2gfj-fr43-4735",
  "modified": "2026-04-29T18:31:35Z",
  "published": "2026-04-29T18:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7386"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fatbobman/mail-mcp-bridge/issues/2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fatbobman/mail-mcp-bridge/commit/638b162b26532e32fa8d8047f638537dbdfe197a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fatbobman/mail-mcp-bridge"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fatbobman/mail-mcp-bridge/releases/tag/1.3.4"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/803096"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/360107"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/360107/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS: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/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-7386 (GCVE-0-2026-7386)

Vulnerability from cvelistv5 – Published: 2026-04-29 15:00 – Updated: 2026-04-29 15:32 X_Open Source

Title

fatbobman mail-mcp-bridge mail_mcp_server.py path traversal

Summary

Severity

6.9 (Medium)


                        
                          CVSS: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

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

7.3 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-29 15:32 UTC

CWE

CWE-22 - Path Traversal

Assigner

VulDB mitre root Scorecard

References

7 references

URL	Tags
https://vuldb.com/vuln/360107	vdb-entrytechnical-description
https://vuldb.com/vuln/360107/cti	signaturepermissions-required
https://vuldb.com/submit/803096	third-party-advisory
https://github.com/fatbobman/mail-mcp-bridge/issues/2	exploitissue-tracking
https://github.com/fatbobman/mail-mcp-bridge/comm…	patch
https://github.com/fatbobman/mail-mcp-bridge/rele…	patch
https://github.com/fatbobman/mail-mcp-bridge/	product

Impacted products

1 product

Vendor	Product	Version
fatbobman	mail-mcp-bridge	Affected: 1.3.0 Affected: 1.3.1 Affected: 1.3.2 Affected: 1.3.3 Unaffected: 1.3.4

Credits

LittleW (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-7386",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-29T15:32:00.670022Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
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        "providerMetadata": {
          "dateUpdated": "2026-04-29T15:32:11.201Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "mail-mcp-bridge",
          "vendor": "fatbobman",
          "versions": [
            {
              "status": "affected",
              "version": "1.3.0"
            },
            {
              "status": "affected",
              "version": "1.3.1"
            },
            {
              "status": "affected",
              "version": "1.3.2"
            },
            {
              "status": "affected",
              "version": "1.3.3"
            },
            {
              "status": "unaffected",
              "version": "1.3.4"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "LittleW (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw has been found in fatbobman mail-mcp-bridge up to 1.3.3. Affected is an unknown function of the file src/mail_mcp_server.py. Executing a manipulation of the argument message_ids can lead to path traversal. The attack can be executed remotely. The exploit has been published and may be used. Upgrading to version 1.3.4 is able to address this issue. This patch is called 638b162b26532e32fa8d8047f638537dbdfe197a. Upgrading the affected component is recommended."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS: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",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "Path Traversal",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
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      "references": [
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          "url": "https://vuldb.com/vuln/360107"
        },
        {
          "name": "VDB-360107 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/360107/cti"
        },
        {
          "name": "Submit #803096 | fatbobman mail-mcp-bridge d9e7d9acc2abcf9da8252d76506fc5afbc08d08e Path Traversal",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/803096"
        },
        {
          "tags": [
            "exploit",
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          ],
          "url": "https://github.com/fatbobman/mail-mcp-bridge/issues/2"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/fatbobman/mail-mcp-bridge/commit/638b162b26532e32fa8d8047f638537dbdfe197a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/fatbobman/mail-mcp-bridge/releases/tag/1.3.4"
        },
        {
          "tags": [
            "product"
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          "url": "https://github.com/fatbobman/mail-mcp-bridge/"
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          "time": "2026-04-29T02:00:00.000Z",
          "value": "VulDB entry created"
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        {
          "lang": "en",
          "time": "2026-04-29T10:52:36.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "fatbobman mail-mcp-bridge mail_mcp_server.py path traversal"
    }
  },
  "cveMetadata": {
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    "datePublished": "2026-04-29T15:00:14.719Z",
    "dateReserved": "2026-04-29T08:47:29.276Z",
    "dateUpdated": "2026-04-29T15:32:11.201Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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GHSA-2GFJ-FR43-4735

CVE-2026-7386 (GCVE-0-2026-7386)

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Sightings

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