# CVE-2026-105678: Ghost privilege escalation via user role assignment

Source: https://junglewise.ai/threats/cve-2026-105678-ghost-is-a-node-js-content-management-system-from-0-5-0-until-6  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-05. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-105678 · Severity: medium · CVSS 4.3 · Published 2026-10-05

Ghost is a Node.js content management system used for building blogs and publications. Staff users with Editor or Super Editor roles could exploit an access control flaw to assign themselves higher privileges (such as owner roles) to other users without authorization. This allows an attacker with a lower-privileged staff account to elevate their own access or others' access, potentially gaining full control over the Ghost instance.

Technologies: [Ghost](https://junglewise.ai/threats/technologies/ghost-ghost), [ghost (npm)](https://junglewise.ai/threats/technologies/ghost). Vendors: [Ghost](https://junglewise.ai/threats/vendors/ghost), [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-105678 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105678 being exploited in the wild.

**How severe is CVE-2026-105678?** Medium severity, with a CVSS score of 4.3, published 5 October 2026.

**Which products and versions are affected?** Ghost 0.5.0 to 6.63.x; ghost (npm) >= 0.5.0, < 6.64.0.

**Is there a fix for CVE-2026-105678?** Yes: fixed in 6.64.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-105678 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-105678?** Check whether you run Ghost or ghost (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 6.64.0

## Technical details

The vulnerability is an improper access control check in user role assignment validation. Editors and Super Editors could reassign roles to themselves or lower-privileged users despite lacking permission to do so. The fix adds an additional validation check (editedUserId !== context.user) to prevent users from modifying their own role assignment permissions. Exploitation requires a legitimate staff account with Editor or Super Editor role.

## Affected products

- Ghost Ghost 0.5.0 to 6.63.x

## Identifiers

- CVE-2026-105678
- GHSA-4pvx-fwjj-8gpc

## Timeline

- 2026-10-05: disclosed
- 2026-09-14: patched

## References

- [https://github.com/TryGhost/Ghost/commit/99c5642b9bb481df4811a004a6f19d6143ed9aaf](https://github.com/TryGhost/Ghost/commit/99c5642b9bb481df4811a004a6f19d6143ed9aaf)
- [https://github.com/TryGhost/Ghost/issues/30764](https://github.com/TryGhost/Ghost/issues/30764)

## Related threats

- [Ghost: Path Traversal Vulnerability in Ghost ImageSize Service](https://junglewise.ai/threats/cve-2026-105683-ghost-is-a-node-js-content-management-system-from-6-14-0-until-6)
- [Ghost: Server-Side Request Forgery in Webhook Trigger](https://junglewise.ai/threats/cve-2026-105682-ghost-is-a-node-js-content-management-system-from-1-18-0-until-6)
- [Ghost input validation bypass in comments access control](https://junglewise.ai/threats/cve-2026-105681-ghost-is-a-node-js-content-management-system-from-5-9-0-until-6)
- [Ghost authorization bypass in post deletion](https://junglewise.ai/threats/cve-2026-105680-ghost-is-a-node-js-content-management-system-from-5-81-0-until-6)
- [Ghost content type validation bypass in local file storage](https://junglewise.ai/threats/cve-2026-105679-ghost-is-a-node-js-content-management-system-from-6-22-1-until-6)