CVE-2026-105646: Ghost: Regular Expression Denial of Service in Content Import

Q: Who can exploit this issue?

An attacker needs Administrator access to Ghost and must be able to submit a crafted content import file. It is not exploitable by an unauthenticated remote user based on the provided information.

Q: What is the operational impact of successful exploitation?

Processing the crafted import can consume excessive CPU resources and make the Ghost server unresponsive. The provided vector indicates an availability impact only, with no stated confidentiality or integrity impact.

Q: Which deployments need to be remediated?

Ghost versions from 4.0.0 through 6.67.0 are identified as affected. Update to version 6.67.0, which contains the fix.

Published Oct 5, 2026

Updated

Impact

A crafted content import file could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access.

Vulnerable versions

This vulnerability is present in Ghost from v4.0.0 up to v6.65.0.

Patches

v6.67.0 contains a fix for this issue.

How to update

For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.

If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.

References

Ghost thanks ka3n1x for disclosing this vulnerability responsibly.

For more information

If you have any questions or comments about this advisory, email us at security@ghost.org.

Other sources

Ghost is a Node.js content management system. From 4.0.0 until 6.67.0, a crafted content import file could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.

— MITRE

Affected Software

2 affected componentsFixes available

Ghost Foundation Ghost>=4.0.0<6.67.0

npm/ghost>=4.0.0<6.67.0

6.67.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade npm/ghost to a version that resolves this vulnerability.
Fixed in 6.67.0
Upgrade
Upgrade Ghost to a version that resolves this vulnerability.
Fixed in 6.67.0

Event History

Oct 5, 2026

CVE Published

via MITRE·06:58 PM

Data Sourced

via MITRE·06:58 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·07:17 PM

DescriptionSeverityWeakness

Oct 7, 2026

Advisory Published

via GitHub·08:42 PM

Data Sourced

via GitHub·08:42 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

Who can exploit this issue?

An attacker needs Administrator access to Ghost and must be able to submit a crafted content import file. It is not exploitable by an unauthenticated remote user based on the provided information.

What is the operational impact of successful exploitation?

Processing the crafted import can consume excessive CPU resources and make the Ghost server unresponsive. The provided vector indicates an availability impact only, with no stated confidentiality or integrity impact.

Which deployments need to be remediated?

Ghost versions from 4.0.0 through 6.67.0 are identified as affected. Update to version 6.67.0, which contains the fix.

CVE-2026-105646: Ghost: Regular Expression Denial of Service in Content Import

Other sources

Affected Software

Remediation

Event History

Frequently Asked Questions

Who can exploit this issue?

What is the operational impact of successful exploitation?

Which deployments need to be remediated?

Company

Resources

Contact