How severe is CVE-2026-44723?

CVE-2026-44723 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-44723 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44723?

CVE-2026-44723 affects Vowpalwabbit Vowpal Wabbit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44723?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-44723 have an EU (EUVD) identifier?

Yes. CVE-2026-44723 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31902.

When was CVE-2026-44723 published?

CVE-2026-44723 was published on 2026-05-26 and last updated on 2026-06-17.

CVE-2026-44723

CVE-2026-44723 is a medium-severity vulnerability in Vowpalwabbit Vowpal Wabbit with a CVSS 3.x base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31902
Weakness: CWE-78
Affected product: Vowpalwabbit Vowpal Wabbit
Published: 2026-05-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-44723?: 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.
How severe is CVE-2026-44723?: CVE-2026-44723 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-44723 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44723?: CVE-2026-44723 affects Vowpalwabbit Vowpal Wabbit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44723?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44723 have an EU (EUVD) identifier?: Yes. CVE-2026-44723 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31902.
When was CVE-2026-44723 published?: CVE-2026-44723 was published on 2026-05-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vowpalwabbit:vowpal_wabbit:*:*:*:*:*:*:*:*

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