Vulnerability-Lookup

CVE-2026-44359 (GCVE-0-2026-44359)

Vulnerability from cvelistv5 – Published: 2026-07-19 23:06 – Updated: 2026-07-24 03:56

Title

Meshtastic GitHub repo vulnerable to Arbitrary Code Execution via pull_request_target Fork Checkout in CI Workflow

Summary

Meshtastic is an open source mesh networking solution. Prior to version 2.7.21.1370b23, the Meshtastic GitHub repository's main_matrix.yml workflow is triggered by pull_request_target and multiple jobs check out the attacker's fork code and execute it with access to repository secrets and elevated GITHUB_TOKEN permissions. No approval gate exists. Pull requests from external users with author_association: "NONE" triggered the CI workflow automatically. The workflow directly executes attacker-controlled files from the fork checkout. This issue could have resulted in supply chain compromise, self-hosted runner compromise, and/or repository takeover for the repo. This issue is separate from GHSA-6mwm-v2vv-pp96, which addressed a command injection via github.head_ref in the setup job of the same workflow. That fix correctly moved to environment variables. However, the more critical fork checkout vulnerability across the check, build, and build-debian-src jobs was not addressed. Version 2.7.21.1370b23 contains a patch for thie issue.

Severity

10 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-23 00:00 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')
CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7911 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/meshtastic/firmware/security/a…	x_refsource_CONFIRM
https://github.com/meshtastic/firmware/security/a…	x_refsource_MISC
https://github.com/meshtastic/firmware/commit/571…	x_refsource_MISC
https://drive.google.com/file/d/1GdHT2s5hMYCiHt4z…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
meshtastic	firmware	Affected: < 2.7.21.1370b23	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-44359

Vulnerability from fkie_nvd - Published: 2026-07-20 00:16 - Updated: 2026-10-24 20:10

Severity

10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://drive.google.com/file/d/1GdHT2s5hMYCiHt4zrWt1q58mvL7WQC0M/view?usp=sharing
	security-advisories@github.com	https://github.com/meshtastic/firmware/commit/5716aeba3bc1e1d34fba9567ff88917ede4a78a5
	security-advisories@github.com	https://github.com/meshtastic/firmware/security/advisories/GHSA-6mwm-v2vv-pp96
	security-advisories@github.com	https://github.com/meshtastic/firmware/security/advisories/GHSA-mjx5-98jq-q736

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "firmware",
          "vendor": "meshtastic",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.7.21.1370b23"
            }
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    {
      "lang": "en",
      "value": "Meshtastic is an open source mesh networking solution. Prior to version 2.7.21.1370b23, the Meshtastic GitHub repository\u0027s main_matrix.yml workflow is triggered by pull_request_target  and multiple jobs check out the attacker\u0027s fork code and execute it with access to repository secrets and elevated GITHUB_TOKEN permissions. No approval gate exists. Pull requests from external users with author_association: \"NONE\" triggered the CI workflow automatically. The workflow directly executes attacker-controlled files from the fork checkout. This issue could have resulted in supply chain compromise, self-hosted runner compromise, and/or repository takeover for the repo. This issue is separate from GHSA-6mwm-v2vv-pp96, which addressed a command injection via github.head_ref in the setup job of the same workflow. That fix correctly moved to environment variables. However, the more critical fork checkout vulnerability across the check, build, and build-debian-src jobs was not addressed. Version 2.7.21.1370b23 contains a patch for thie issue."
    },
    {
      "lang": "es",
      "value": "Meshtastic es una soluci\u00f3n de red mallada de c\u00f3digo abierto. Antes de la versi\u00f3n 2.7.21.1370b23, el flujo de trabajo main_matrix.yml del repositorio de GitHub de Meshtastic se activaba mediante pull_request_target y m\u00faltiples trabajos extra\u00edan el c\u00f3digo del fork del atacante y lo ejecutaban con acceso a los secretos del repositorio y permisos elevados de GITHUB_TOKEN. No exist\u00eda una puerta de aprobaci\u00f3n. Las solicitudes de extracci\u00f3n de usuarios externos con author_association: \u2019NONE\u2019 activaban autom\u00e1ticamente el flujo de trabajo de CI. El flujo de trabajo ejecutaba directamente archivos controlados por el atacante desde la extracci\u00f3n del fork. Este problema podr\u00eda haber resultado en un compromiso de la cadena de suministro, un compromiso del runner autoalojado y/o una toma de control del repositorio. Este problema es independiente de GHSA-6mwm-v2vv-pp96, que abord\u00f3 una inyecci\u00f3n de comandos a trav\u00e9s de github.head_ref en el trabajo de configuraci\u00f3n del mismo flujo de trabajo. Esa correcci\u00f3n se movi\u00f3 correctamente a variables de entorno. Sin embargo, la vulnerabilidad m\u00e1s cr\u00edtica de extracci\u00f3n del fork en los trabajos de check, build y build-debian-src no fue abordada. La versi\u00f3n 2.7.21.1370b23 contiene un parche para este problema."
    }
  ],
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    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-44359",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-23T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-20T00:16:58.210",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://drive.google.com/file/d/1GdHT2s5hMYCiHt4zrWt1q58mvL7WQC0M/view?usp=sharing"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/meshtastic/firmware/commit/5716aeba3bc1e1d34fba9567ff88917ede4a78a5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/meshtastic/firmware/security/advisories/GHSA-6mwm-v2vv-pp96"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/meshtastic/firmware/security/advisories/GHSA-mjx5-98jq-q736"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        },
        {
          "lang": "en",
          "value": "CWE-829"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

UBUNTU-CVE-2026-44359 (CVE-2026-44359)

Vulnerability from osv_ubuntu – Published: 2026-07-20 00:16 – Updated: 2026-10-17 09:42 – Source website

Details

Severity

10.0 (Critical)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-44359	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-44359	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-meshtastic",
            "binary_version": "2.7.11-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "meshtastic",
        "purl": "pkg:deb/ubuntu/meshtastic@2.7.11-1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.7-1",
        "2.7.8-1",
        "2.7.9-1",
        "2.7.9-2",
        "2.7.10-1",
        "2.7.10-2",
        "2.7.11-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Meshtastic is an open source mesh networking solution. Prior to version 2.7.21.1370b23, the Meshtastic GitHub repository\u0027s main_matrix.yml workflow is triggered by pull_request_target  and multiple jobs check out the attacker\u0027s fork code and execute it with access to repository secrets and elevated GITHUB_TOKEN permissions. No approval gate exists. Pull requests from external users with author_association: \"NONE\" triggered the CI workflow automatically. The workflow directly executes attacker-controlled files from the fork checkout. This issue could have resulted in supply chain compromise, self-hosted runner compromise, and/or repository takeover for the repo. This issue is separate from GHSA-6mwm-v2vv-pp96, which addressed a command injection via github.head_ref in the setup job of the same workflow. That fix correctly moved to environment variables. However, the more critical fork checkout vulnerability across the check, build, and build-debian-src jobs was not addressed. Version 2.7.21.1370b23 contains a patch for thie issue.",
  "id": "UBUNTU-CVE-2026-44359",
  "modified": "2026-10-17T09:42:29Z",
  "published": "2026-07-20T00:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44359"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-44359"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-44359"
  ]
}

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.

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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.
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CVE-2026-44359 (GCVE-0-2026-44359)

FKIE_CVE-2026-44359

UBUNTU-CVE-2026-44359 (CVE-2026-44359)

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