UBUNTU-CVE-2026-44359

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Source
https://ubuntu.com/security/CVE-2026-44359
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44359.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-44359
Upstream
Published
2026-07-20T00:16:00Z
Modified
2026-07-29T10:17:12Z
Severity
  • 10.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:26.04:LTS / meshtastic

Package

Name
meshtastic
Purl
pkg:deb/ubuntu/meshtastic?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.6.4-1
2.7.3-1
2.7.4-1
2.7.5-1
2.7.6-1
2.7.7-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-meshtastic",
            "binary_version": "2.7.7-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44359.json"