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No exploitation reportedFix available

CVE-2021-3583

No exploitation reported by the sources we read.

  • Published2021-09-22
  • Fixed in2.11.2rc1 · 2.10.11rc1 · 2.9.23 · 2.9.23rc1
  • WeaknessCWE-20 · CWE-94

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2021-09-2212:15CVE publishedNVD

Versions per branch

OSV · NVD
Redhat ansible engine
BranchAffectedFixed in
2.11≥ 2.11.0a1, < 2.11.2rc12.11.2rc1
2.10≥ 2.10.0a1, < 2.10.11rc12.10.11rc1
2.9< 2.9.232.9.23
2.9< 2.9.23rc12.9.23rc1
Redhat ansible automation platform
BranchAffectedFixed in
1.2= 1.2no fix published
Redhat ansible tower
BranchAffectedFixed in
3.7< 3.7.03.7.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • ansibleUbuntu:Pro:22.04:LTSall versions · fixed in 2.10.7+merged+base+2.10.8+dfsg-1ubuntu0.1~esm1
  • ansibleUbuntu:Pro:20.04:LTSall versions · fixed in 2.9.6+dfsg-1ubuntu0.1~esm1
  • ansibleUbuntu:Pro:18.04:LTSall versions · fixed in 2.5.1+dfsg-1ubuntu0.1+esm1
  • ansibleUbuntu:Pro:16.04:LTSall versions · fixed in 2.0.0.2-2ubuntu1.3+esm1
  • ansibleUbuntu:26.10all versions · no fixed version listed
  • ansibleUbuntu:26.04:LTSall versions · no fixed version listed
  • ansibleUbuntu:25.10all versions · no fixed version listed
  • ansibleUbuntu:24.04:LTSall versions · no fixed version listed

93 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Redhat ansible engine to 2.11.2rc1 · 2.10.11rc1 · 2.9.23 · 2.9.23rc1

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.17.1read 2026-10-23
  • NVDCVSS 2.03.6read 2026-10-23
  • CNAweakness (CWE)CWE-20known since 2026-10-23
  • NVDweakness (CWE)CWE-94read 2026-10-23
  • FIRST EPSSEPSS score0.9 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2021-09-23

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
2021-09-22
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-2pfh-q76x-gwvm

Frequently asked questions

What is CVE-2021-3583?

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.

Is CVE-2021-3583 actively exploited?

Active exploitation of CVE-2021-3583 has not been confirmed. Its EPSS score was 0.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-3583?

CVE-2021-3583 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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