Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vowpalwabbit | Vowpal Wabbit | < 2026-05-04 |
Related Weaknesses (CWE)
References
- https://github.com/VowpalWabbit/vowpal_wabbit/commit/998e390e80a7e8192d7849b7784Patch
- https://github.com/VowpalWabbit/vowpal_wabbit/security/advisories/GHSA-cg2g-xgg7ExploitMitigationVendor Advisory
- https://github.com/VowpalWabbit/vowpal_wabbit/security/advisories/GHSA-cg2g-xgg7ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-44723?
CVE-2026-44723 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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 s...
How severe is CVE-2026-44723?
CVE-2026-44723 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44723?
Check the references section above for vendor advisories and patch information. Affected products include: Vowpalwabbit Vowpal Wabbit.