CVE-2026-105675: Ghost Invite Token Disclosure Vulnerability

HIGH
Advisory Identifier: GHSA-v6q3-xqxm-6f5v
Share
CVSS 7.5
CWE-203 CWE-943
Published
Advisory Summary

CVE-2026-105675 is a HIGH (CVSS 7.5) invite token disclosure vulnerability (CWE-203: Observable Discrepancy) affecting Ghost libraries in the npm ecosystem. The issue involves invite token disclosure in ghost admin api. Remediation is available by upgrading affected packages to version 6.64.0.

CVE-2026-105675 at a Glance

CVE Identifier CVE-2026-105675
GHSA Identifier GHSA-v6q3-xqxm-6f5v
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-203: Observable Discrepancy
Affected Product Ghost
Package Ecosystem npm
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-2026-105675

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-2026-105675, 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-203: Observable Discrepancy, where the product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized 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 permission to view staff invites were able to discover the secret token of pending invites, including invites for roles with higher privileges than their own. This could allow a staff user to escalate their privileges by accepting a pending invite. ### Vulnerable versions This vulnerability is present in Ghost from v4.39.0 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 [CoryRoo](https://github.com/CoryRoo), 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-2026-105675 Affected Ghost Versions

1 component(s)
Fixed Versions:
6.64.0
Product / Package Ecosystem Affected Versions Fixed Version
ghost
npm/ghost
npm
≥ 4.39.0
< 6.64.0
6.64.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/TryGhost/Ghost/security/advisories/GHSA-v6q3-xqxm-6f5v
NVD — CVE-2026-105675 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105675
Ghost Source Repository REPOSITORY
https://github.com/TryGhost/Ghost/pull/30760
Security Fix Commit FIX COMMIT
https://github.com/TryGhost/Ghost/commit/4fb587e4d49667f929b87f7d6a873ae5e9cc087f
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-2026-105675?
CVE-2026-105675 is a security vulnerability in Ghost involving Invite Token Disclosure in Ghost Admin API under CWE-203: Observable Discrepancy.
Which Ghost versions are affected?
Affected versions include releases prior to 6.64.0 across affected packages: ghost.
What version fixes CVE-2026-105675?
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-2026-105675?
CVE-2026-105675 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-2026-105675?
CVE-2026-105675 is classified under CWE-203: Observable Discrepancy (The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.).
How can I check npm dependencies for CVE-2026-105675?
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-v6q3-xqxm-6f5v",
  "modified" : "2026-10-07T20:26:19Z",
  "published" : "2026-10-07T20:26:19Z",
  "aliases" : [ "CVE-2026-105675" ],
  "summary" : "Ghost: Invite Token Disclosure in Ghost Admin API",
  "details" : "### Impact\n\nStaff users with permission to view staff invites were able to discover the secret token of pending invites, including invites for roles with higher privileges than their own. This could allow a staff user to escalate their privileges by accepting a pending invite.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v4.39.0 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 [CoryRoo](https://github.com/CoryRoo), 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:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ghost"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.39.0"
      }, {
        "fixed" : "6.64.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/security/advisories/GHSA-v6q3-xqxm-6f5v"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-105675"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/pull/30760"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/commit/4fb587e4d49667f929b87f7d6a873ae5e9cc087f"
  }, {
    "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-203", "CWE-943" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T20:26:19Z",
    "nvd_published_at" : "2026-10-05T20:17:14Z"
  }
}