CVE-2026-12398: Galaxy NG Command Injection Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-6hw7-j4jw-wpff
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CVSS 7.5
CWE-78
Published
Advisory Summary

CVE-2026-12398 is a HIGH (CVSS 7.5) command injection vulnerability vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')) affecting Galaxy NG libraries in the PyPI ecosystem. The issue involves command injection vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2026-12398 at a Glance

CVE Identifier CVE-2026-12398
GHSA Identifier GHSA-6hw7-j4jw-wpff
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Product Galaxy NG
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-12398

To remediate this vulnerability, upgrade all affected Galaxy NG dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

galaxy-ng fixed: Latest secure release 
pip install galaxy-ng>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show galaxy-ng

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-12398, inspect your installed packages using pip:

pip show galaxy-ng

Analyze the terminal output to locate any version of Galaxy NG in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show galaxy-ng command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), where the product constructs all or part of an os command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended os command when it is sent to a downstream component. In Galaxy NG, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A command injection vulnerability was found in galaxy_ng. The do_git_checkout() function in the legacy role import API (v1) interpolates unsanitized git ref names (branch/tag names) into shell commands executed via subprocess.run() with shell=True. An authenticated user who controls a git repository can create a branch or tag with shell metacharacters in the name to achieve remote code execution on the pulp worker. The vulnerable endpoint is only reachable when GALAXY_ENABLE_LEGACY_ROLES is set to True, which is not the default configuration.

CVE-2026-12398 Affected Galaxy NG Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
galaxy-ng
pypi/galaxy-ng
PyPI
≤ 4.9.2

References

NVD — CVE-2026-12398 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12398
Galaxy NG Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-12398
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2489180
Galaxy NG Source Repository REPOSITORY
https://github.com/ansible/galaxy_ng

Frequently Asked Questions

What is CVE-2026-12398?
CVE-2026-12398 is a security vulnerability in Galaxy NG involving command injection vulnerability under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection').
Which Galaxy NG versions are affected?
Affected versions include releases prior to current release patches across affected packages: galaxy-ng.
What version fixes CVE-2026-12398?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is galaxy-ng affected?
Yes, galaxy-ng is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-12398?
CVE-2026-12398 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-12398?
CVE-2026-12398 is classified under CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.).
How can I check PyPI dependencies for CVE-2026-12398?
Run the dependency tree command: 'pip show galaxy-ng'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6hw7-j4jw-wpff",
  "modified" : "2026-06-19T20:48:05Z",
  "published" : "2026-06-16T15:33:51Z",
  "aliases" : [ "CVE-2026-12398" ],
  "summary" : "Galaxy NG: command injection vulnerability",
  "details" : "A command injection vulnerability was found in galaxy_ng. The do_git_checkout() function in the legacy role import API (v1) interpolates unsanitized git ref names (branch/tag names) into shell commands executed via subprocess.run() with shell=True. An authenticated user who controls a git repository can create a branch or tag with shell metacharacters in the name to achieve remote code execution on the pulp worker. The vulnerable endpoint is only reachable when GALAXY_ENABLE_LEGACY_ROLES is set to True, which is not the default configuration.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "galaxy-ng"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "4.9.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-12398"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-12398"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2489180"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ansible/galaxy_ng"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-19T20:48:05Z",
    "nvd_published_at" : "2026-06-16T15:16:36Z"
  }
}