CVE-2026-44723 (GCVE-0-2026-44723)

Vulnerability from cvelistv5 – Published: 2026-05-26 15:49 – Updated: 2026-05-28 13:58
VLAI
Title
Vowpal Wabbit: Shell injection via crafted PR title in python_checks.yml allows arbitrary command execution on CI runner
Summary
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.
Severity
5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 13:57 UTC
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  • CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
VowpalWabbit vowpal_wabbit Affected: < 998e390e80a7e8192d7849b7784bc113dbd190ad
Create a notification for this product.
Show details on NVD website
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