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Vulnerability record · CVE-2021-3583 · published 22 September 2021

CVE-2021-3583: Redhat ansible automation platform improper input validation vulnerability

Redhat · Ansible Automation Platform

A flaw was found in Ansible, where a user's controller is vulnerable to template injection. This issue can occur through facts used in the template if the user is trying to put templates in multi-line YAML strings and the facts being handled do not routinely include special template characters. This flaw allows attackers to perform command injection, which discloses sensitive information. The highest threat from this vulnerability is to confidentiality and integrity.

7.1 CVSS 3.1 High EPSS 0.90% · top 41.8% CWE-20 · Improper input validationCWE-94 · Code injection
7.1CVSS 3.1 base score, v2 3.6
0.90%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

A flaw was found in Ansible, where a user's controller is vulnerable to template injection. This issue can occur through facts used in the template if the user is trying to put templates in multi-line YAML strings and the facts being handled do not routinely include special template characters. This flaw allows attackers to perform command injection, which discloses sensitive information. The highest threat from this vulnerability is to confidentiality and integrity.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1968412 Issue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00018.html
https://bugzilla.redhat.com/show_bug.cgi?id=1968412 Issue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00018.html

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Source: NIST National Vulnerability Database (record CVE-2021-3583), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.