How severe is CVE-2014-4966?

CVE-2014-4966 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2014-4966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-4966?

CVE-2014-4966 affects Redhat Ansible. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2014-4966?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2014-4966 published?

CVE-2014-4966 was published on 2020-02-18 and last updated on 2026-06-17.

CVE-2014-4966

CVE-2014-4966 is a critical-severity vulnerability in Redhat Ansible with a CVSS 3.x base score of 9.8. 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-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Redhat Ansible
Published: 2020-02-18
Last modified: 2026-06-17

Description

Ansible before 1.6.7 does not prevent inventory data with "{{" and "lookup" substrings, and does not prevent remote data with "{{" substrings, which allows remote attackers to execute arbitrary code via (1) crafted lookup('pipe') calls or (2) crafted Jinja2 data.

Frequently asked questions

What is CVE-2014-4966?: Ansible before 1.6.7 does not prevent inventory data with "{{" and "lookup" substrings, and does not prevent remote data with "{{" substrings, which allows remote attackers to execute arbitrary code via (1) crafted lookup('pipe') calls or (2) crafted Jinja2 data.
How severe is CVE-2014-4966?: CVE-2014-4966 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2014-4966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-4966?: CVE-2014-4966 affects Redhat Ansible. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2014-4966?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2014-4966 published?: CVE-2014-4966 was published on 2020-02-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:ansible:*:*:*:*:*:*:*:*

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