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CVE-2016-4972 — Vulnerability in murano — CVE Details

CRITICAL

OpenStack Murano Code Execution

Published June 29, 2026Updated July 1, 2026Source: osv

Summary

OpenStack Murano before 1.0.3 (liberty) and 2.x before 2.0.1 (mitaka), Murano-dashboard before 1.0.3 (liberty) and 2.x before 2.0.1 (mitaka), and python-muranoclient before 0.7.3 (liberty) and 0.8.x before 0.8.5 (mitaka) improperly use loaders inherited from yaml.Loader when parsing MuranoPL and UI files, which allows remote attackers to create arbitrary Python objects and execute arbitrary code via crafted extended YAML tags in UI definitions in packages.

Advisory Timeline

  • First published June 29, 2026 (105 days ago).
  • Last revised July 1, 2026 — 2 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update murano to 1.0.3 or later
pip install "murano>=1.0.3"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
murano
pypi
0, 1.0.0, 1.0.0.0b1, 1.0.0.0b2 (+4 more)1.0.3

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2016-4972?
OpenStack Murano Code Execution This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2016-4972?
CVE-2016-4972 affects murano. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2016-4972 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

PYSEC-2026-429
GHSA-87r7-q54j-f9qg
PYSEC-2016-22
PYSEC-2026-430

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