CVE-2026-105683: Ghost Path Traversal Vulnerability

LOW
Advisory Identifier: GHSA-83rp-q473-j88c
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CVSS 3.8
CWE-35
Published
Advisory Summary

CVE-2026-105683 is a LOW (CVSS 3.8) path traversal vulnerability (CWE-35: Path Traversal: '.../...//') affecting Ghost libraries in the npm ecosystem. The issue involves path traversal vulnerability in ghost imagesize service. Remediation is available by upgrading affected packages to version 6.27.0.

CVE-2026-105683 at a Glance

CVE Identifier CVE-2026-105683
GHSA Identifier GHSA-83rp-q473-j88c
Severity LOW
CVSS v3.1 Base Score 3.8
CWE Classification CWE-35: Path Traversal: '.../...//'
Affected Product Ghost
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 3.8

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

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

How to Fix CVE-2026-105683

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: 6.27.0 
npm install ghost@6.27.0
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-2026-105683, 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 6.27.0), 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-35: Path Traversal: '.../...//', where the product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '.../...//' (doubled triple dot slash) sequences that can resolve to a location that is outside of that directory. 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 An input validation issue may have allowed staff users to access local files outside the intended data storage directories on the server. ### Vulnerable versions This vulnerability is present in Ghost from v6.14.0 up to v6.27.0. ### Patches v6.27.0 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 [l3tchupkt](https://github.com/l3tchupkt) and krn0@bugcrowdninja.com 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-2026-105683 Affected Ghost Versions

1 component(s)
Fixed Versions:
6.27.0
Product / Package Ecosystem Affected Versions Fixed Version
ghost
npm/ghost
npm
≥ 6.14.0
< 6.27.0
6.27.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/TryGhost/Ghost/security/advisories/GHSA-83rp-q473-j88c
NVD — CVE-2026-105683 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105683
Ghost Source Repository REPOSITORY
https://github.com/TryGhost/Ghost/pull/27217
Security Fix Commit FIX COMMIT
https://github.com/TryGhost/Ghost/commit/770d438fd9d352bbfccbe81dd890580a1d3fd6f0
Ghost Source Repository REPOSITORY
https://github.com/TryGhost/Ghost
Ghost Release RELEASE
https://github.com/TryGhost/Ghost/releases/tag/v6.27.0

Frequently Asked Questions

What is CVE-2026-105683?
CVE-2026-105683 is a security vulnerability in Ghost involving Path Traversal Vulnerability in Ghost ImageSize Service under CWE-35: Path Traversal: '.../...//'.
Which Ghost versions are affected?
Affected versions include releases prior to 6.27.0 across affected packages: ghost.
What version fixes CVE-2026-105683?
Upgrading to 6.27.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ghost affected?
Yes, ghost is affected in releases prior to 6.27.0. Upgrade your dependency to 6.27.0 or later.
What is the CVSS score of CVE-2026-105683?
CVE-2026-105683 has a CVSS v3.1 base score of 3.8 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:L.
What CWE is associated with CVE-2026-105683?
CVE-2026-105683 is classified under CWE-35: Path Traversal: '.../...//' (The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '.../...//' (doubled triple dot slash) sequences that can resolve to a location that is outside of that directory.).
How can I check npm dependencies for CVE-2026-105683?
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-83rp-q473-j88c",
  "modified" : "2026-10-07T16:17:54Z",
  "published" : "2026-10-07T16:17:54Z",
  "aliases" : [ "CVE-2026-105683" ],
  "summary" : "Ghost: Path Traversal Vulnerability in Ghost ImageSize Service",
  "details" : "### Impact\n\nAn input validation issue may have allowed staff users to access local files outside the intended data storage directories on the server.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v6.14.0 up to v6.27.0.\n\n### Patches\n\nv6.27.0 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\n### References\n\nGhost thanks [l3tchupkt](https://github.com/l3tchupkt) and krn0@bugcrowdninja.com 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:H/UI:N/S:U/C:L/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ghost"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.14.0"
      }, {
        "fixed" : "6.27.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/security/advisories/GHSA-83rp-q473-j88c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-105683"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/pull/27217"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/commit/770d438fd9d352bbfccbe81dd890580a1d3fd6f0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TryGhost/Ghost"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TryGhost/Ghost/releases/tag/v6.27.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-35" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T16:17:54Z",
    "nvd_published_at" : "2026-10-05T20:17:17Z"
  }
}