{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-44359", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-05T20:15:20.630Z", "datePublished": "2026-07-19T23:06:32.005Z", "dateUpdated": "2026-07-19T23:06:32.005Z"}, "containers": {"cna": {"title": "Meshtastic GitHub repo vulnerable to Arbitrary Code Execution via pull_request_target Fork Checkout in CI Workflow", "problemTypes": [{"descriptions": [{"cweId": "CWE-94", "lang": "en", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-829", "lang": "en", "description": "CWE-829: Inclusion of Functionality from Untrusted Control Sphere", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 10, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/meshtastic/firmware/security/advisories/GHSA-mjx5-98jq-q736", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/meshtastic/firmware/security/advisories/GHSA-mjx5-98jq-q736"}, {"name": "https://github.com/meshtastic/firmware/security/advisories/GHSA-6mwm-v2vv-pp96", "tags": ["x_refsource_MISC"], "url": "https://github.com/meshtastic/firmware/security/advisories/GHSA-6mwm-v2vv-pp96"}, {"name": "https://github.com/meshtastic/firmware/commit/5716aeba3bc1e1d34fba9567ff88917ede4a78a5", "tags": ["x_refsource_MISC"], "url": "https://github.com/meshtastic/firmware/commit/5716aeba3bc1e1d34fba9567ff88917ede4a78a5"}, {"name": "https://drive.google.com/file/d/1GdHT2s5hMYCiHt4zrWt1q58mvL7WQC0M/view?usp=sharing", "tags": ["x_refsource_MISC"], "url": "https://drive.google.com/file/d/1GdHT2s5hMYCiHt4zrWt1q58mvL7WQC0M/view?usp=sharing"}], "affected": [{"vendor": "meshtastic", "product": "firmware", "versions": [{"version": "< 2.7.21.1370b23", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-19T23:06:32.005Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-mjx5-98jq-q736", "discovery": "UNKNOWN"}}}}

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