CVEvulnerability

CVE-2026-44723

9.9 CRITICAL Published 2026-05-26 Modified 2026-07-24 Official page ↗
Status
Analyzed
Published
2026-05-26
Last modified
2026-07-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.0 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS 3.1 ([email protected])
9.9 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-1336, CWE-78

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.

Affected configurations

• vowpalwabbit vowpal wabbit (< 2026-05-04)

Related

Weakness · CWE (2)

  • CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command weakness

References