{"id":"CVE-2026-44723","summary":"Vowpal Wabbit: Shell injection via crafted PR title in python_checks.yml allows arbitrary command execution on CI runner","details":"Vowpal Wabbit is a machine learning system. The workflow .github/workflows/python_checks.yml embeds ${{ github.event.pull_request.title }} directly inside double-quoted bash strings in four separate steps across four jobs, each passing it as a CLI argument to the Python test script run_tests_model_gen_and_load.py. The shell interprets the expanded string before invoking Python, allowing an attacker to break out of the quotes and execute arbitrary commands on the runner. The pull_request trigger fires on PRs targeting any branch (branches: ['*']), with no additional access gate. This vulnerability is fixed by the 998e390e80a7e8192d7849b7784bc113dbd190ad commit.","aliases":["GHSA-cg2g-xgg7-3xxq"],"modified":"2026-07-15T01:48:58.329124786Z","published":"2026-05-26T15:49:17.951Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"fixed":"998e390e80a7e8192d7849b7784bc113dbd190ad"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-1336","CWE-78"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44723.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44723.json"},{"type":"ADVISORY","url":"https://github.com/VowpalWabbit/vowpal_wabbit/security/advisories/GHSA-cg2g-xgg7-3xxq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44723"},{"type":"FIX","url":"https://github.com/VowpalWabbit/vowpal_wabbit/commit/998e390e80a7e8192d7849b7784bc113dbd190ad"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vowpalwabbit/vowpal_wabbit","events":[{"introduced":"0"},{"fixed":"998e390e80a7e8192d7849b7784bc113dbd190ad"}],"database_specific":{"source":"REFERENCES"}}],"versions":["9.11.2","wasm_v0.0.9","9.11.1","9.10.0","wasm_v0.0.7","9.9.0","wasm_v0.0.6","wasm_v0.0.5","wasm_v0.0.4","wasm_v0.0.3","9.8.0","9.7.0","9.6.0","9.5.0","9.4.0","9.3.0","9.2.0","9.1.0","9.0.0","8.11.0","8.10.0","8.9.0","8.8.0","8.7.0","r_l.snapshot.1","8.6.0","7.4","6.1","6.0","4.1","4.0","2.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44723.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"}]}