CVE-2026-105678: Ghost Editors Could Promote Staff Users Vulnerability

MODERATE
Advisory Identifier: GHSA-4pvx-fwjj-8gpc
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CVSS 4.3
CWE-269 CWE-863
Published
Advisory Summary

CVE-2026-105678 is a MODERATE (CVSS 4.3) editors could promote staff users vulnerability (CWE-269: Improper Privilege Management) affecting Ghost libraries in the npm ecosystem. The issue involves editors could promote staff users to their own role. Remediation is available by upgrading affected packages to version 6.64.0.

CVE-2026-105678 at a Glance

CVE Identifier CVE-2026-105678
GHSA Identifier GHSA-4pvx-fwjj-8gpc
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-269: Improper Privilege Management
Affected Product Ghost
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.3

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

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

How to Fix CVE-2026-105678

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

ghost fixed: 6.64.0 
npm install ghost@6.64.0
Verify Direct and Transitive Dependencies

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

npm ls ghost

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-105678, inspect your project dependencies using npm:

npm ls ghost

Analyze the terminal output to locate any version of Ghost in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.64.0), your application is affected.

Note: The npm ls ghost command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-269: Improper Privilege Management, where the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. In Ghost, 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

### Impact Staff users with the Editor or Super Editor role were able to assign their own role to Author and Contributor users, despite not having permission to assign that role. ### Vulnerable versions This vulnerability is present in Ghost from v0.5.0 up to v6.64.0. ### Patches v6.64.0 contains a fix for this issue. ### How to update For self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). If your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). ### References Ghost thanks [SecBuddyF](https://github.com/SecBuddyF) of [Tencent KeenLab](https://github.com/KeenSecurityLab), [Santosh Kumar Puppala](https://github.com/Santoshkumarpuppala), Pedro Pinho, and [Nhat Anh Vu](https://github.com/nhattanhh) for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email us at [security@ghost.org](mailto:security@ghost.org).

CVE-2026-105678 Affected Ghost Versions

1 component(s)
Fixed Versions:
6.64.0
Product / Package Ecosystem Affected Versions Fixed Version
ghost
npm/ghost
npm
≥ 0.5.0
< 6.64.0
6.64.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/TryGhost/Ghost/security/advisories/GHSA-4pvx-fwjj-8gpc
NVD — CVE-2026-105678 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105678
Ghost Source Repository REPOSITORY
https://github.com/TryGhost/Ghost/issues/30764
Ghost Source Repository REPOSITORY
https://github.com/TryGhost/Ghost/pull/30764
Security Fix Commit FIX COMMIT
https://github.com/TryGhost/Ghost/commit/99c5642b9bb481df4811a004a6f19d6143ed9aaf
Ghost Source Repository REPOSITORY
https://github.com/TryGhost/Ghost
Ghost Release RELEASE
https://github.com/TryGhost/Ghost/releases/tag/v6.64.0

Frequently Asked Questions

What is CVE-2026-105678?
CVE-2026-105678 is a security vulnerability in Ghost involving Editors Could Promote Staff Users to Their Own Role under CWE-269: Improper Privilege Management.
Which Ghost versions are affected?
Affected versions include releases prior to 6.64.0 across affected packages: ghost.
What version fixes CVE-2026-105678?
Upgrading to 6.64.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ghost affected?
Yes, ghost is affected in releases prior to 6.64.0. Upgrade your dependency to 6.64.0 or later.
What is the CVSS score of CVE-2026-105678?
CVE-2026-105678 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2026-105678?
CVE-2026-105678 is classified under CWE-269: Improper Privilege Management (The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.).
How can I check npm dependencies for CVE-2026-105678?
Run the dependency tree command: 'npm ls ghost'. 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-4pvx-fwjj-8gpc",
  "modified" : "2026-10-07T20:26:03Z",
  "published" : "2026-10-07T20:26:03Z",
  "aliases" : [ "CVE-2026-105678" ],
  "summary" : "Ghost: Editors Could Promote Staff Users to Their Own Role",
  "details" : "### Impact\n\nStaff users with the Editor or Super Editor role were able to assign their own role to Author and Contributor users, despite not having permission to assign that role.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v0.5.0 up to v6.64.0.\n\n### Patches\n\nv6.64.0 contains a fix for this issue.\n\n### How to update\n\nFor self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). \n\nIf your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). \n\n### References\n\nGhost thanks [SecBuddyF](https://github.com/SecBuddyF) of [Tencent KeenLab](https://github.com/KeenSecurityLab), [Santosh Kumar Puppala](https://github.com/Santoshkumarpuppala), Pedro Pinho, and [Nhat Anh Vu](https://github.com/nhattanhh) for disclosing this vulnerability responsibly.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@ghost.org](mailto:security@ghost.org).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ghost"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.5.0"
      }, {
        "fixed" : "6.64.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/security/advisories/GHSA-4pvx-fwjj-8gpc"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-105678"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/issues/30764"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/pull/30764"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/commit/99c5642b9bb481df4811a004a6f19d6143ed9aaf"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TryGhost/Ghost"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/releases/tag/v6.64.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-269", "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T20:26:03Z",
    "nvd_published_at" : "2026-10-05T20:17:14Z"
  }
}