CVE-2026-105645

MEDIUM 4.9

Ghost: Regular Expression Denial of Service in External Media Inliner

CVSS Score

4.9

EPSS Score

0.0%

EPSS Percentile

0th

Ghost is a Node.js content management system. From 5.37.0 until 6.67.0, a crafted request to the external media inliner could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.

CWE	CWE-1333
Vendor	tryghost
Product	ghost
Published	Oct 5, 2026
Last Updated	Oct 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

TryGhost / Ghost

>= 5.37.0, < 6.67.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/TryGhost/Ghost/security/advisories/GHSA-9m4w-fmjw-fvjq github.com: https://github.com/TryGhost/Ghost/issues/31058 github.com: https://github.com/TryGhost/Ghost/commit/88ae6d6d56f8a239cb38a8c89de02f034f50e2ce github.com: https://github.com/TryGhost/Ghost/releases/tag/v6.66.0