CVE-2026-44723
5.0 MEDIUMVowpal Wabbit is a machine learning system
Published: 2026-05-26 · Last updated: 2026-05-28
Severity and scoring
- CVSS
- 5.0 MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- CWE
- CWE-1336, CWE-78
Affected products
| Vendor | Product |
|---|---|
| vowpalwabbit | vowpal_wabbit |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-44723
- [Patch]https://github.com/VowpalWabbit/vowpal_wabbit/commit/998e390e80a7e8192d7849b7784bc113dbd190ad
- [Vendor advisory]https://github.com/VowpalWabbit/vowpal_wabbit/security/advisories/GHSA-cg2g-xgg7-3xxq
- [Vendor advisory]https://github.com/VowpalWabbit/vowpal_wabbit/security/advisories/GHSA-cg2g-xgg7-3xxq
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