What is CVE-2014-4657?

CVE-2014-4657 is a critical-severity vulnerability in Red Hat Ansible, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2020-02-20.

How severe is CVE-2014-4657?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Red Hat Ansible

CVE-2014-4657

The safe_eval function in Ansible before 1.5.4 does not properly restrict the code subset, which allows remote attackers to execute arbitrary code via crafted instructions.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2020-02-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.044 (91.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000

Affected products

Red Hat Ansible

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/ansible/ansible/blob/release1.5.5/CHANGELOG.md (Release Notes)
www.securityfocus.com/bid/68232 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2014-4657?: CVE-2014-4657 is a critical-severity vulnerability in Red Hat Ansible, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2020-02-20.
How severe is CVE-2014-4657?: Critical severity. CVSS v3 base score is 9.8 out of 10.