{"id":"UBUNTU-CVE-2026-44359","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.","modified":"2026-07-29T10:17:12.668204288Z","published":"2026-07-20T00:16:00Z","upstream":["CVE-2026-44359"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44359"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44359"}],"affected":[{"package":{"name":"meshtastic","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/meshtastic?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["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_version":"2.7.7-1","binary_name":"python3-meshtastic"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44359.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}