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CVE-2026-44723

Vowpal Wabbit: Shell injection via crafted PR title in python_checks.yml allows arbitrary command execution on CI runner PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
VowpalWabbit / vowpal_wabbitaffected < 998e390e80a7e8192d7849b7784bc113dbd190ad

CWE

CWE-78, CWE-1336

References

ADP enrichment

CISA-ADP

No English description supplied.